An allocation of resources without limits or throttling vulnerability exists in curl <v7.88.0 based on the "chained" HTTP compression algori
Noroxi assessment
Priority: Monitor (action score 27/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.7% (FIRST EPSS); higher than 77.3% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
- Fixed version: curl (AlmaLinux:8) 7.61.1-25.el8_7.3; libcurl (AlmaLinux:8) 7.61.1-25.el8_7.3; libcurl-devel (AlmaLinux:8) 7.61.1-25.el8_7.3.
- Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to curl (AlmaLinux:8) 7.61.1-25.el8_7.3; libcurl (AlmaLinux:8) 7.61.1-25.el8_7.3; libcurl-devel (AlmaLinux:8) 7.61.1-25.el8_7.3 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 allocation of resources without limits or throttling vulnerability exists in curl <v7.88.0 based on the "chained" HTTP compression algorithms, meaning that a server response can be compressed multiple times and potentially with differentalgorithms. The number of acceptable "links" in this "decompression chain" wascapped, but the cap was implemented on a per-header basis allowing a maliciousserver to insert a virtually unlimited number of compression steps simply byusing many headers. The use of such a decompression chain could result in a "malloc bomb", making curl end up spending enormous amounts of allocated heap memory, or trying to and returning out of memory errors.
- Published
- Feb 23, 2023
- Updated
- Oct 14, 2026
- EPSS
- 1.7% · 77th percentile
- CWE
- CWE-770
Report tools
Action score
27
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 1.7%
CISA SSVC decision
- Exploitation
- proof of concept
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 6.5
- CNA · hackerone
- 6.5
- 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
- No public exploit code on record
- 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 |
|---|---|---|
| haxx | curl | cpe:2.3:a:haxx:curl |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| netapp | h300s firmware | cpe:2.3:o:netapp:h300s_firmware |
| netapp | h300s | cpe:2.3:h:netapp:h300s |
| netapp | h500s firmware | cpe:2.3:o:netapp:h500s_firmware |
| netapp | h500s | cpe:2.3:h:netapp:h500s |
| netapp | h700s firmware | cpe:2.3:o:netapp:h700s_firmware |
| netapp | h700s | cpe:2.3:h:netapp:h700s |
| netapp | h410s firmware | cpe:2.3:o:netapp:h410s_firmware |
| netapp | h410s | cpe:2.3:h:netapp:h410s |
| netapp | clustered data ontap | cpe:2.3:a:netapp:clustered_data_ontap |
and 1 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux10.0
- debian debian linux11.0
- fedoraproject fedora36
- haxx curl7.57.0 and later · before 7.88.0
- netapp clustered data ontapall versions
- netapp h300s firmwareall versions
- netapp h410s firmwareall versions
- netapp h500s firmwareall versions
- netapp h700s firmwareall versions
- splunk universal forwarder8.2.0 and later · before 8.2.12
- splunk universal forwarder9.0.0 and later · before 9.0.6
- splunk universal forwarder9.1.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (hackerone). Independent of NVD's CPE analysis and usually ahead of it.
n/a https://github.com/curl/curl
- Fixed in 7.88.0affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | curl | before 7.61.1-25.el8_7.3 | 7.61.1-25.el8_7.3 |
| AlmaLinux:8 | libcurl | before 7.61.1-25.el8_7.3 | 7.61.1-25.el8_7.3 |
| AlmaLinux:8 | libcurl-devel | before 7.61.1-25.el8_7.3 | 7.61.1-25.el8_7.3 |
| AlmaLinux:8 | libcurl-minimal | before 7.61.1-25.el8_7.3 | 7.61.1-25.el8_7.3 |
| AlmaLinux:9 | curl | before 7.76.1-19.el9_1.2 | 7.76.1-19.el9_1.2 |
| AlmaLinux:9 | curl-minimal | before 7.76.1-19.el9_1.2 | 7.76.1-19.el9_1.2 |
| AlmaLinux:9 | libcurl | before 7.76.1-19.el9_1.2 | 7.76.1-19.el9_1.2 |
| AlmaLinux:9 | libcurl-devel | before 7.76.1-19.el9_1.2 | 7.76.1-19.el9_1.2 |
| AlmaLinux:9 | libcurl-minimal | before 7.76.1-19.el9_1.2 | 7.76.1-19.el9_1.2 |
| Alpine:v3.14 | curl | from 7.57.0 · before 7.79.1-r5 | 7.79.1-r5 |
| Alpine:v3.15 | curl | from 7.57.0 · before 7.80.0-r6 | 7.80.0-r6 |
| Alpine:v3.16 | curl | from 7.57.0 · before 7.83.1-r6 | 7.83.1-r6 |
| Alpine:v3.17 | curl | from 7.57.0 · before 7.87.0-r2 | 7.87.0-r2 |
| Alpine:v3.18 | curl | from 7.57.0 · before 7.88.0-r0 | 7.88.0-r0 |
| Debian:10 | curl | before 7.64.0-4+deb10u5 | 7.64.0-4+deb10u5 |
| Debian:11 | curl | before 7.74.0-1.3+deb11u7 | 7.74.0-1.3+deb11u7 |
| Debian:12 | curl | before 7.88.1-1 | 7.88.1-1 |
| openSUSE:Tumbleweed | curl | before 7.88.1-1.1 | 7.88.1-1.1 |
| Red Hat:enterprise_linux:8::baseos | curl | before 0:7.61.1-25.el8_7.3 | 0:7.61.1-25.el8_7.3 |
| Red Hat:enterprise_linux:8::baseos | curl-debuginfo | before 0:7.61.1-25.el8_7.3 | 0:7.61.1-25.el8_7.3 |
| Red Hat:enterprise_linux:8::baseos | curl-debugsource | before 0:7.61.1-25.el8_7.3 | 0:7.61.1-25.el8_7.3 |
| Red Hat:enterprise_linux:8::baseos | curl-minimal-debuginfo | before 0:7.61.1-25.el8_7.3 | 0:7.61.1-25.el8_7.3 |
| Red Hat:enterprise_linux:8::baseos | libcurl | before 0:7.61.1-25.el8_7.3 | 0:7.61.1-25.el8_7.3 |
| Red Hat:enterprise_linux:8::baseos | libcurl-debuginfo | before 0:7.61.1-25.el8_7.3 | 0:7.61.1-25.el8_7.3 |
+96
Same product
haxx: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-22901curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session t51Plan
- CVE-2023-38039When curl retrieves an HTTP response, it stores the incoming headers so that
they can be accessed later via the libcurl headers API.47Plan
- CVE-2024-2398HTTP/2 push headers memory-leak45Plan
Published before and after this one in the same product
- ← EarlierCVE-2023-23914Feb 23, 2023 · A cleartext transmission of sensitive information vulnerability exists in curl <v7.88.0 that could cause HSTS functionality fail when multip36Monitor
- ← EarlierCVE-2023-23915Feb 23, 2023 · A cleartext transmission of sensitive information vulnerability exists in curl <v7.88.0 that could cause HSTS functionality to behave incorr26Monitor
- Later →CVE-2023-27533Mar 30, 2023 · A vulnerability in input validation exists in curl <8.0 during communication using the TELNET protocol may allow an attacker to pass on mali36Monitor
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:curl | 7.61.1-25.el8_7.3 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:curl-minimal | 7.76.1-19.el9_1.2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libcurl | 7.61.1-25.el8_7.3 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:libcurl-devel | 7.61.1-25.el8_7.3 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:libcurl-minimal | 7.61.1-25.el8_7.3 · AlmaLinux:8 | Package registry (OSV) |
| alpine:curl | 7.79.1-r5 · Alpine:v3.14 | Package registry (OSV) |
| debian:curl | 7.88.1-1 · Debian:12 | Package registry (OSV) |
| opensuse:curl | 7.79.1-150400.5.15.1 · openSUSE:Leap Micro 5.3 | Package registry (OSV) |
| red hat:curl | 0:7.61.1-25.el8_7.3 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:curl-debuginfo | 0:7.61.1-25.el8_7.3 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:curl-debugsource | 0:7.61.1-25.el8_7.3 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:curl-minimal | 0:7.76.1-19.el9_1.2 · Red Hat:enterprise_linux:9::baseos | Package registry (OSV) |
| red hat:curl-minimal-debuginfo | 0:7.61.1-25.el8_7.3 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:jbcs-httpd24-httpd | 0:2.4.51-39.el7jbcs · Red Hat:jboss_core_services:1::el7 | Package registry (OSV) |
| red hat:jbcs-httpd24-httpd-debuginfo | 0:2.4.51-39.el7jbcs · Red Hat:jboss_core_services:1::el7 | Package registry (OSV) |
| red hat:libcurl | 0:7.61.1-25.el8_7.3 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:libcurl-debuginfo | 0:7.61.1-25.el8_7.3 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:libcurl-devel | 0:7.61.1-25.el8_7.3 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:libcurl-minimal | 0:7.61.1-25.el8_7.3 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| red hat:libcurl-minimal-debuginfo | 0:7.61.1-25.el8_7.3 · Red Hat:enterprise_linux:8::baseos | Package registry (OSV) |
| rocky linux:curl | 0:7.61.1-25.el8_7.3 · Rocky Linux:8 | Package registry (OSV) |
| suse:curl | 7.60.0-11.55.1 · SUSE:Linux Enterprise Software Development Kit 12 SP5 | Package registry (OSV) |
| suse:curl | 7.79.1-150400.5.15.1 · SUSE:Linux Enterprise Micro 5.3 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
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.
No dated events beyond publication.
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.
No commit or PR link among the references.
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-23-0325 · Jun 6, 2023(Red Hat JBoss Enterprise Application Sunucu Güvenlik Güncellemesi)
- TR-23-0118 · Mar 1, 2023(Curl Güvenlik Güncellemesi)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-770 · Allocation of Resources Without Limits or ThrottlingCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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)
- FloodingCAPEC-125likelihood: High · Medium
- Excessive AllocationCAPEC-130likelihood: Medium · Medium
- XML Ping of the DeathCAPEC-147likelihood: Low · Medium
- Exponential Data ExpansionCAPEC-197likelihood: High · Medium
- Serialized Data Parameter BlowupCAPEC-229likelihood: High · High
- Serialized Data with Nested PayloadsCAPEC-230likelihood: Medium · High
- Oversized Serialized Data PayloadsCAPEC-231likelihood: Medium · High
- HTTP DoSCAPEC-469Low
ATT&CK techniques
- Network Denial of Service:Direct Network FloodT1498.001
- Network Denial of Service:Reflection AmplificationT1498.002
- Endpoint Denial of ServiceT1499
- Endpoint Denial of Service: OS Exhaustion FloodT1499.001
- Endpoint Denial of Service:Service Exhaustion FloodT1499.002
- Endpoint Denial of Service:Application Exhaustion FloodT1499.003
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (5 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.