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CVE-2024-6923· NVD / CVE Program· CNA PSF

Email header injection due to unquoted newlines

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 1.1% (FIRST EPSS); higher than 65.3% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: Python Software Foundation CPython 3.10.15, 3.11.10, 3.12.5; Azure Linux 3.0 ARM 3.12.3-3; Azure Linux 3.0 x64 3.12.3-3.

Low priority for now. Upgrade to Python Software Foundation CPython 3.10.15, 3.11.10, 3.12.5; Azure Linux 3.0 ARM 3.12.3-3; Azure Linux 3.0 x64 3.12.3-3 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

There is a MEDIUM severity vulnerability affecting CPython. The email module didn’t properly quote newlines for email headers when serializing an email message allowing for header injection when an email is serialized.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Aug 1, 2024
Updated
Jun 17, 2026
EPSS
1.1% · 65th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.1%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

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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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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.

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Affected 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.

VendorProduct
pythoncpython

Versions reported by the vendor

Affected version ranges reported by the assigning authority (PSF). Independent of NVD's CPE analysis and usually ahead of it.

  • Python Software Foundation CPython

    • before 3.8.20affected · python
    • 3.9.0 and later · before 3.9.20affected · python
    • 3.10.0 and later · before 3.10.15affected · python
    • 3.11.0 and later · before 3.11.10affected · python
    • 3.12.0 and later · before 3.12.5affected · python
    • 3.13.0a1 and later · before 3.13.0rc2affected · python

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8platform-pythonbefore 3.6.8-67.el8_10.alma.13.6.8-67.el8_10.alma.1
AlmaLinux:8platform-python-debugbefore 3.6.8-67.el8_10.alma.13.6.8-67.el8_10.alma.1
AlmaLinux:8platform-python-develbefore 3.6.8-67.el8_10.alma.13.6.8-67.el8_10.alma.1
AlmaLinux:8python3-idlebefore 3.6.8-67.el8_10.alma.13.6.8-67.el8_10.alma.1
AlmaLinux:8python3-libsbefore 3.6.8-67.el8_10.alma.13.6.8-67.el8_10.alma.1
AlmaLinux:8python3-testbefore 3.6.8-67.el8_10.alma.13.6.8-67.el8_10.alma.1
AlmaLinux:8python3-tkinterbefore 3.6.8-67.el8_10.alma.13.6.8-67.el8_10.alma.1
AlmaLinux:8python3.11before 3.11.9-7.el8_103.11.9-7.el8_10
AlmaLinux:8python3.11-debugbefore 3.11.9-7.el8_103.11.9-7.el8_10
AlmaLinux:8python3.11-develbefore 3.11.9-7.el8_103.11.9-7.el8_10
AlmaLinux:8python3.11-idlebefore 3.11.9-7.el8_103.11.9-7.el8_10
AlmaLinux:8python3.11-libsbefore 3.11.9-7.el8_103.11.9-7.el8_10
AlmaLinux:8python3.11-rpm-macrosbefore 3.11.9-7.el8_103.11.9-7.el8_10
AlmaLinux:8python3.11-testbefore 3.11.9-7.el8_103.11.9-7.el8_10
AlmaLinux:8python3.11-tkinterbefore 3.11.9-7.el8_103.11.9-7.el8_10
AlmaLinux:8python3.12before 3.12.5-2.el8_103.12.5-2.el8_10
AlmaLinux:8python3.12-debugbefore 3.12.5-2.el8_103.12.5-2.el8_10
AlmaLinux:8python3.12-develbefore 3.12.5-2.el8_103.12.5-2.el8_10
AlmaLinux:8python3.12-idlebefore 3.12.5-2.el8_103.12.5-2.el8_10
AlmaLinux:8python3.12-libsbefore 3.12.5-2.el8_103.12.5-2.el8_10
AlmaLinux:8python3.12-rpm-macrosbefore 3.12.5-2.el8_103.12.5-2.el8_10
AlmaLinux:8python3.12-testbefore 3.12.5-2.el8_103.12.5-2.el8_10
AlmaLinux:8python3.12-tkinterbefore 3.12.5-2.el8_103.12.5-2.el8_10
AlmaLinux:8python39before 3.9.19-7.module_el8.10.0+3885+d986a3913.9.19-7.module_el8.10.0+3885+d986a391

+96

Same product

python software foundation: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-4517Arbitrary writes via tarfile realpath overflow
    37Monitor
  • CVE-2026-19445Use-after-free of a server-side SSLContext when sni_callback switches contexts
    36Monitor
  • CVE-2026-6100Use-after-free in lzma.LZMADecompressor, bz2.BZ2Decompressor, and gzip.GzipFile after re-use under memory pressure
    36Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2024-5642Jun 27, 2024 · Buffer overread when using an empty list with SSLContext.set_npn_protocols()
    26Monitor
  • ← EarlierCVE-2024-3219Jul 29, 2024 · Pure-Python fallback of socket.socketpair() doesn’t authenticate peer connection
    20Monitor
  • Later →CVE-2024-8088Aug 22, 2024 · Infinite loop when iterating over zip archive entry names from zipfile.Path
    34Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Python Software Foundation CPython3.10.15Vendor (CNA)
Python Software Foundation CPython3.11.10Vendor (CNA)
Python Software Foundation CPython3.12.5Vendor (CNA)
Python Software Foundation CPython3.13.0rc2Vendor (CNA)
Python Software Foundation CPython3.8.20Vendor (CNA)
Python Software Foundation CPython3.9.20Vendor (CNA)
Azure Linux 3.0 ARM3.12.3-3 · python3Microsoft (MSRC)
Azure Linux 3.0 x643.12.3-3 · python3Microsoft (MSRC)
CBL Mariner 2.0 ARM3.9.19-8 · python3Microsoft (MSRC)
CBL Mariner 2.0 x643.9.19-8 · python3Microsoft (MSRC)
almalinux:python393.9.19-7.module_el8.10.0+3885+d986a391 · AlmaLinux:8Package registry (OSV)
almalinux:python39-attrs20.3.0-2.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-cffi1.14.3-2.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-chardet3.0.4-19.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-cryptography3.3.1-3.module_el8.10.0+3765+2f9a457d · AlmaLinux:8Package registry (OSV)
almalinux:python39-Cython0.29.21-5.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-debug3.9.19-7.module_el8.10.0+3885+d986a391 · AlmaLinux:8Package registry (OSV)
almalinux:python39-devel3.9.19-7.module_el8.10.0+3885+d986a391 · AlmaLinux:8Package registry (OSV)
almalinux:python39-idle3.9.19-7.module_el8.10.0+3885+d986a391 · AlmaLinux:8Package registry (OSV)
almalinux:python39-idna2.10-4.module_el8.10.0+3849+a48d89aa · AlmaLinux:8Package registry (OSV)
almalinux:python39-iniconfig1.1.1-2.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
almalinux:python39-PyMySQL0.10.1-2.module_el8.6.0+2780+a40f65e1 · AlmaLinux:8Package registry (OSV)
alpine:python33.10.15-r0 · Alpine:v3.17Package registry (OSV)
debian:pypy37.3.18+dfsg-1 · Debian:13Package registry (OSV)
debian:python3.113.11.2-6+deb12u5 · Debian:12Package registry (OSV)
debian:python3.133.13.0~rc2-1 · Debian:13Package registry (OSV)
debian:python3.93.9.2-1+deb11u2 · Debian:11Package registry (OSV)
opensuse:python3103.10.14-150400.4.54.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:python310-core3.10.14-150400.4.54.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:python310-documentation3.10.14-150400.4.54.1 · openSUSE:Leap 15.5Package registry (OSV)

+45

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.

EPSS, last 120 days

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 researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

—

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2024-32193 days apartPure-Python fallback of socket.socketpair() doesn’t authenticate peer connection
    20Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-94 · Improper Control of Generation of Code ('Code Injection')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (14 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records