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CVE-2025-11468

Folding email comments of unfoldable characters doesn't preserve parenthesis

Published: Jan 20, 2026Updated: Mar 3, 2026 Sources: CVE List NVD BDUCWE-93
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.5%
Top 58.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

When folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email messages where addresses are user-controlled and not sanitized.

CVSS Vector Breakdown

AV:NAC:LC:NI:HA:N
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Impact
C:NConfidentiality
None
I:HIntegrity
H
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-93

Affected Products

Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
red hat inc.commercialUSOperating Systemsaka red hat
canonical ltd.commercialGBOperating Systemsaka canonical
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
ооо «ред софт»commercialRUOperating Systemsaka red soft
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
and 6 more affected products View all →

Exploitability

Official Patch Available

References

https://github.com/python/cpython/commit/003b8315669b9f08b1010a49071f73f15f818094
github.com
https://github.com/python/cpython/commit/17d1490aa97bd6b98a42b1a9b324ead84e7fd8a2
github.com
https://github.com/python/cpython/commit/61614a5e5056e4f61ced65008d4576f3df34acb6
github.com
and 22 more references View all →

Timeline

Published
Jan 20, 2026
Last Updated
Mar 3, 2026

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