Vulnerability in Python Software Foundation Cpython
CVE-2025-1795
During an address list folding when a separating comma ends up on a folded line and that line is to be unicode-encoded then the separator itself is also unicode-encoded. Expected behavior is that the separating comma remains a plan comma. This can result in the address header being misinterpreted by some mail servers.
Published · last modified .
EPSS exploit prediction
EPSS: 0.006 (48.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000
Affected products
- Python Software Foundation Cpython — versions 3.13.0a1, 3.10.0, 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/python/cpython/issues/100884 (issue-tracking)
- github.com/python/cpython/pull/100885 (patch)
- github.com/python/cpython/pull/119099 (patch)
- github.com/python/cpython/commit/09fab93c3d857496c0bd162797fab816c311ee48 (patch)
- github.com/python/cpython/commit/70754d21c288535e86070ca7a6e90dcb670b8593 (patch)
- github.com/python/cpython/commit/9148b77e0af91cdacaa7fe3dfac09635c3fe9a74 (patch)
- mail.python.org/archives/list/security-announce@python.org/thread/MB62IZMEC3UM6… (vendor-advisory)
- github.com/python/cpython/commit/a4ef689ce670684ec132204b1cd03720c8e0a03d (patch)
- github.com/python/cpython/commit/d4df3c55e4c5513947f907f24766b34d2ae8c090 (patch)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-1795?
- CVE-2025-1795 is a vulnerability in Python Software Foundation Cpython, classified under Improper Encoding or Escaping of Output. Published 2025-02-28.
- Is CVE-2025-1795 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.