CVE-2024-6923Email header injection due to unquoted newlines
- 5.5MediumCVSS base score
- 1.1%Exploitation in 30 daysEPSS · top 34% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
Description
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: a proof of concept is public.
Timeline
ID reserved
By PSF
- 13 days later
· 13 days later
Published
- 15 months later
· 15 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L |
| NVDNVD · Deferred | 3.1 | Medium5.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L |
- EPSS (exploitation in 30 days)
- 1.1% · top 34% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
Python Software Foundation · CPython
- affected < 3.8.20
- affected 3.9.0 – < 3.9.20
- affected 3.10.0 – < 3.10.15
- affected 3.11.0 – < 3.11.10
- affected 3.12.0 – < 3.12.5
- affected 3.13.0a1 – < 3.13.0rc2
References
References15
- https://github.com/python/cpython/pull/122233 (opens in a new tab)patch
- https://github.com/python/cpython/issues/121650 (opens in a new tab)issue-tracking
- https://mail.python.org/archives/list/[email protected]/thread/QH3BUOE2DYQBWP7NAQ7UNHPPOELKISRW/ (opens in a new tab)vendor-advisory
- https://github.com/python/cpython/commit/4766d1200fdf8b6728137aa2927a297e224d5fa7 (opens in a new tab)patch
- https://github.com/python/cpython/commit/4aaa4259b5a6e664b7316a4d60bdec7ee0f124d0 (opens in a new tab)patch
- https://github.com/python/cpython/commit/06f28dc236708f72871c64d4bc4b4ea144c50147 (opens in a new tab)patch
- https://github.com/python/cpython/commit/b158a76ce094897c870fb6b3de62887b7ccc33f1 (opens in a new tab)patch
- https://github.com/python/cpython/commit/f7be505d137a22528cb0fc004422c0081d5d90e6 (opens in a new tab)patch
- https://github.com/python/cpython/commit/f7c0f09e69e950cf3c5ada9dbde93898eb975533 (opens in a new tab)patch
- https://github.com/python/cpython/commit/097633981879b3c9de9a1dd120d3aa585ecc2384 (opens in a new tab)patch
- http://www.openwall.com/lists/oss-security/2024/08/01/3 (opens in a new tab)
- http://www.openwall.com/lists/oss-security/2024/08/02/2 (opens in a new tab)
- https://security.netapp.com/advisory/ntap-20240926-0003/ (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/01/msg00005.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-48020 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-6923)Record last updated .