An issue in the urllib.parse component of Python before 3.11.4 allows attackers to bypass blocklisting methods by supplying a URL that start
Noroxi assessment
Priority: Monitor (action score 36/100)
- Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
- Probability of exploitation in the next 30 days: 20.4% (FIRST EPSS); higher than 97.4% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- According to CISA the attack is automatable: targets can be found by mass scanning.
- Fixed version: babel (AlmaLinux:8) 2.5.1-10.module_el8.6.0+2781+fed64c13; platform-python (AlmaLinux:8) 3.6.8-51.el8_8.1.alma; platform-python-debug (AlmaLinux:8) 3.6.8-51.el8_8.1.alma.
- Mentioned 3 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to babel (AlmaLinux:8) 2.5.1-10.module_el8.6.0+2781+fed64c13; platform-python (AlmaLinux:8) 3.6.8-51.el8_8.1.alma; platform-python-debug (AlmaLinux:8) 3.6.8-51.el8_8.1.alma or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
An issue in the urllib.parse component of Python before 3.11.4 allows attackers to bypass blocklisting methods by supplying a URL that starts with blank characters.
- BDU:2023-04978
- ALSA-2023:3585
- ALSA-2023:3591
- ALSA-2023:3594
- ALSA-2023:3595
- ALSA-2023:3780
- ALSA-2023:3781
- ALSA-2023:3811
- DLA-3575-1
- DLA-3948-1
- DLA-3980-1
- openSUSE-SU-2024:12741-1
- openSUSE-SU-2024:12742-1
- openSUSE-SU-2024:12747-1
- openSUSE-SU-2024:12748-1
- openSUSE-SU-2024:12752-1
- openSUSE-SU-2024:13032-1
- openSUSE-SU-2024:13038-1
- openSUSE-SU-2026:11589-1
- RHSA-2023:3550
- Published
- Feb 17, 2023
- Updated
- Oct 14, 2026
- EPSS
- 20.4% · 97th percentile
- CWE
- CWE-20
Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 6 / 30 · 20.4%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.5
- CNA · mitre
- 7.5
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- Proof of concept exists, no weaponized module
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| python | python | cpe:2.3:a:python:python |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| netapp | active iq unified manager | cpe:2.3:a:netapp:active_iq_unified_manager |
| netapp | management services for element software | cpe:2.3:a:netapp:management_services_for_element_software |
| netapp | management services for netapp hci | cpe:2.3:a:netapp:management_services_for_netapp_hci |
| netapp | ontap select deploy administration utility | cpe:2.3:a:netapp:ontap_select_deploy_administration_utility |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- fedoraproject fedora36
- fedoraproject fedora37
- fedoraproject fedora38
- netapp active iq unified managerall versions
- netapp management services for element softwareall versions
- netapp management services for netapp hciall versions
- netapp ontap select deploy administration utilityall versions
- python python3.11.0 and later · before 3.11.4
- python python3.10.0 and later · before 3.10.12
- python python3.9.0 and later · before 3.9.17
- python python3.8.0 and later · before 3.8.17
- python pythonbefore 3.7.17
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | babel | before 2.5.1-10.module_el8.6.0+2781+fed64c13 | 2.5.1-10.module_el8.6.0+2781+fed64c13 |
| AlmaLinux:8 | platform-python | before 3.6.8-51.el8_8.1.alma | 3.6.8-51.el8_8.1.alma |
| AlmaLinux:8 | platform-python-debug | before 3.6.8-51.el8_8.1.alma | 3.6.8-51.el8_8.1.alma |
| AlmaLinux:8 | platform-python-devel | before 3.6.8-51.el8_8.1.alma | 3.6.8-51.el8_8.1.alma |
| AlmaLinux:8 | python-nose-docs | before 1.3.7-31.module_el8.6.0+2781+fed64c13 | 1.3.7-31.module_el8.6.0+2781+fed64c13 |
| AlmaLinux:8 | python-psycopg2-doc | before 2.7.5-7.module_el8.6.0+3162+01a09e5a | 2.7.5-7.module_el8.6.0+3162+01a09e5a |
| AlmaLinux:8 | python-psycopg2-doc | before 2.7.5-7.module_el8.6.0+2781+fed64c13 | 2.7.5-7.module_el8.6.0+2781+fed64c13 |
| AlmaLinux:8 | python-sqlalchemy-doc | before 1.3.2-2.module_el8.6.0+2781+fed64c13 | 1.3.2-2.module_el8.6.0+2781+fed64c13 |
| AlmaLinux:8 | python2 | before 2.7.18-13.module_el8.8.0+3580+eeda85da.1.alma | 2.7.18-13.module_el8.8.0+3580+eeda85da.1.alma |
| AlmaLinux:8 | python2-attrs | before 17.4.0-10.module_el8.6.0+2781+fed64c13 | 17.4.0-10.module_el8.6.0+2781+fed64c13 |
| AlmaLinux:8 | python2-babel | before 2.5.1-10.module_el8.6.0+2781+fed64c13 | 2.5.1-10.module_el8.6.0+2781+fed64c13 |
| AlmaLinux:8 | python2-backports | before 1.0-16.module_el8.6.0+3162+01a09e5a | 1.0-16.module_el8.6.0+3162+01a09e5a |
| AlmaLinux:8 | python2-backports | before 1.0-16.module_el8.6.0+2781+fed64c13 | 1.0-16.module_el8.6.0+2781+fed64c13 |
| AlmaLinux:8 | python2-backports-ssl_match_hostname | before 3.5.0.1-12.module_el8.6.0+2781+fed64c13 | 3.5.0.1-12.module_el8.6.0+2781+fed64c13 |
| AlmaLinux:8 | python2-bson | before 3.7.0-1.module_el8.6.0+3162+01a09e5a | 3.7.0-1.module_el8.6.0+3162+01a09e5a |
| AlmaLinux:8 | python2-bson | before 3.7.0-1.module_el8.6.0+2781+fed64c13 | 3.7.0-1.module_el8.6.0+2781+fed64c13 |
| AlmaLinux:8 | python2-chardet | before 3.0.4-10.module_el8.6.0+2781+fed64c13 | 3.0.4-10.module_el8.6.0+2781+fed64c13 |
| AlmaLinux:8 | python2-coverage | before 4.5.1-4.module_el8.6.0+3162+01a09e5a | 4.5.1-4.module_el8.6.0+3162+01a09e5a |
| AlmaLinux:8 | python2-coverage | before 4.5.1-4.module_el8.6.0+2781+fed64c13 | 4.5.1-4.module_el8.6.0+2781+fed64c13 |
| AlmaLinux:8 | python2-Cython | before 0.28.1-7.module_el8.6.0+2781+fed64c13 | 0.28.1-7.module_el8.6.0+2781+fed64c13 |
| AlmaLinux:8 | python2-Cython | before 0.28.1-7.module_el8.6.0+3162+01a09e5a | 0.28.1-7.module_el8.6.0+3162+01a09e5a |
| AlmaLinux:8 | python2-debug | before 2.7.18-13.module_el8.8.0+3580+eeda85da.1.alma | 2.7.18-13.module_el8.8.0+3580+eeda85da.1.alma |
| AlmaLinux:8 | python2-devel | before 2.7.18-13.module_el8.8.0+3580+eeda85da.1.alma | 2.7.18-13.module_el8.8.0+3580+eeda85da.1.alma |
| AlmaLinux:8 | python2-dns | before 1.15.0-10.module_el8.6.0+2781+fed64c13 | 1.15.0-10.module_el8.6.0+2781+fed64c13 |
+96
Same product
python: all recordsOther highest-scoring records for the same primary product.
- CVE-2016-5636Integer overflow in the get_data function in zipimport.c in CPython (aka Python) before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 all47Plan
- CVE-2007-4559Directory traversal vulnerability in the (1) extract and (2) extractall functions in the tarfile module in Python allows user-assisted remot47Plan
- CVE-2021-3177Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Pyth46Plan
Published before and after this one in the same product
- ← EarlierCVE-2022-42919Nov 6, 2022 · Python 3.9.x before 3.9.16 and 3.10.x before 3.10.9 on Linux allows local privilege escalation in a non-default configuration.31Monitor
- ← EarlierCVE-2022-45061Nov 9, 2022 · An issue was discovered in Python before 3.11.1.31Monitor
- Later →CVE-2023-27043Apr 18, 2023 · The email module of Python through 3.11.3 incorrectly parses e-mail addresses that contain a special character.22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:platform-python | 3.6.8-51.el8_8.1.alma · AlmaLinux:8 | Package registry (OSV) |
| almalinux:platform-python-debug | 3.6.8-51.el8_8.1.alma · AlmaLinux:8 | Package registry (OSV) |
| almalinux:platform-python-devel | 3.6.8-51.el8_8.1.alma · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python3-idle | 3.6.8-51.el8_8.1.alma · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python3-libs | 3.6.8-51.el8_8.1.alma · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python3.11 | 3.11.2-2.el9_2.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:python3.11-debug | 3.11.2-2.el9_2.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:python3.11-devel | 3.11.2-2.el9_2.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:python3.11-idle | 3.11.2-2.el9_2.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:python3.11-libs | 3.11.2-2.el9_2.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:python3.11-test | 3.11.2-2.el9_2.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:python3.11-tkinter | 3.11.2-2.el9_2.1 · AlmaLinux:9 | Package registry (OSV) |
| debian:pypy3 | 7.3.11+dfsg-2+deb12u2 · Debian:12 | Package registry (OSV) |
| debian:python2.7 | 2.7.16-2+deb10u3 · Debian:10 | Package registry (OSV) |
| debian:python3.11 | 3.11.2-6+deb12u2 · Debian:12 | Package registry (OSV) |
| debian:python3.9 | 3.9.2-1+deb11u2 · Debian:11 | Package registry (OSV) |
| opensuse:python | 2.7.18-150000.48.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| opensuse:python-base | 2.7.18-150000.48.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| opensuse:python-doc | 2.7.18-150000.48.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| opensuse:python39 | 3.9.16-150300.4.24.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| opensuse:python39-core | 3.9.16-150300.4.24.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| opensuse:python39-documentation | 3.9.16-150300.4.24.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| red hat:python | 0:2.6.6-69.el6_10 · Red Hat:rhel_els:6 | Package registry (OSV) |
| red hat:python-debug | 0:2.7.5-93.el7_9 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:python-debuginfo | 0:2.6.6-69.el6_10 · Red Hat:rhel_els:6 | Package registry (OSV) |
| red hat:python-devel | 0:2.6.6-69.el6_10 · Red Hat:rhel_els:6 | Package registry (OSV) |
| red hat:python-libs | 0:2.6.6-69.el6_10 · Red Hat:rhel_els:6 | Package registry (OSV) |
| red hat:python-test | 0:2.6.6-69.el6_10 · Red Hat:rhel_els:6 | Package registry (OSV) |
| red hat:python-tools | 0:2.6.6-69.el6_10 · Red Hat:rhel_els:6 | Package registry (OSV) |
| red hat:python3 | 0:3.6.8-19.el7_9 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
+26
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×5
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:0 | 2023-08-17 |
| Proof-of-concept repository on GitHub | stars:0 | 2023-08-18 |
| Proof-of-concept repository on GitHub | stars:0 | 2024-05-03 |
| Proof-of-concept repository on GitHub | stars:0 | 2026-04-18 |
| Proof-of-concept repository on GitHub | stars:0 | 2026-10-20 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+180 d
- TodayOct 22, 2026+1342 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-23-0499 · Sep 7, 2023(Multicluster Engine Güvenlik Zafiyeti)
- TR-23-0437 · Aug 2, 2023(Mozilla Firefox Güvenlik Güncellemesi)
- TR-23-0169 · Mar 23, 2023(SUSE Güvenlik Güncellemesi)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- high · data or configuration can be modified
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- High
- Availability impact
- None
Weakness class (CWE)
CWE-20 · Improper Input ValidationCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Server Side Include (SSI) InjectionCAPEC-101likelihood: High · High
- Cross Zone ScriptingCAPEC-104likelihood: Medium · High
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Double EncodingCAPEC-120likelihood: Low · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
ATT&CK techniques
- Obfuscated Files or InformationT1027
- Masquerading: Invalid Code SignatureT1036.001
- Steal Web Session CookieT1539
- Subvert Trust Controls: Code SigningT1553.002
- Impair Defenses:Impair Command History LoggingT1562.003
- Hijack Execution Flow:Dynamic Linker HijackingT1574.006
- Hijack Execution Flow:Path Interception by PATH Environment VariableT1574.007
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- github.com/python/cpython/pull/99421
- lists.debian.org/debian-lts-announce/2023/09/msg00022.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6PEVICI7YNGGMSL3UCMWGE66QFLATH72/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DSL6NSOAXWBJJ67XPLSSC74MNKZF3BBO/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EM2XLZSTXG44TMFXF4E6VTGKR2MQCW3G/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F2NY75GFDZ5T6YPN44D3VMFT5SUVTOTG/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GR5US3BYILYJ4SKBV6YBNPRUBAL5P2CN/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H23OSKC6UG6IWOQAUPW74YUHWRWVXJP7/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JZTLGV2HYFF4AMYJL25VDIGAIHCU7UPA/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWC4WGXER5P6Q75RFGL7QUTPP3N5JR7T/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MZEHSXSCMA4WWQKXT6QV7AAR6SWNZ2VP/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O5SP4RT3RRS434ZS2HQKQJ3VZW7YPKYR/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OHHJHJRLEF3TDT2K3676CAUVRDD4CCMR/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PEUN6T22UJFXR7J5F6UUHCXXPKJ2DVHI/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PURM5CFDABEWAIWZFD2MQ7ZJGCPYSQ44/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q3J5N24ECS4B6MJDRO6UAYU6GPLYBDCL/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRQHN7RWJQJHYP6E5EKESOYP5VDSHZG4/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RA2MBEEES6L46OD64OBSVUUMGKNGMOWW/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4IDB5OAR5Y4UK3HLMZBW4WEL2B7YFMJ/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.