🛡️ CVE-2025-1795 on Debian — pypy3

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

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.

Distribution advisory

This page covers CVE-2025-1795 as tracked by Debian, for the package pypy3. The fix is available in version 7.3.18+dfsg-1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.

Affected software

DEBIAN-CVE-2025-1795 is recorded against 4 packages.

pypy3 (fixed in 7.3.18+dfsg-1)
python3.11 (fixed in 3.11.2-6+deb12u6)
python3.13 (fixed in 3.13.0~b1-1)
python3.9 (fixed in 3.9.2-1+deb11u3)

Timeline and source

Published on 28 February 2025 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security-tracker.debian.org (Advisory)

CVE-2025-1795 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Base record Ubuntu

Details

Severity Unknown

CVSS Score N/A

CVSS Vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2025-02-28

Updated 2026-08-12

Modified 2026-08-04

Fix URL N/A

Affected Packages

Software	From version	Fixed in
pypy3	—	7.3.18+dfsg-1
python3.11	—	3.11.2-6+deb12u6
python3.13	—	3.13.0~b1-1
python3.9	—	3.9.2-1+deb11u3

References

ADVISORY https://security-tracker.debian.org/tracker/CVE-2025-1795

🔗 NVD 🔗 Mitre

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