CVE-2026-1299

medium Red Hat
CVSS v3 Base Score
7.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
EPSS Score
0.0%
Exploitation probability in 30 days
Top 86% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
Low
Integrity
High
Availability
None
Published: January 23, 2026 (111 days ago)
Last Modified: January 23, 2026
Vendor: Red Hat
Fix Available: ✓ Yes

Description

The email module, specifically the "BytesGenerator" class, didn’t properly quote newlines for email headers when serializing an email message allowing for header injection when an email is serialized. This is only applicable if using "LiteralHeader" writing headers that don't respect email folding rules, the new behavior will reject the incorrectly folded headers in "BytesGenerator".

CWE

CWE-93

Affected Products

Red Hat Enterprise Linux 10Red Hat Enterprise Linux 6Red Hat Enterprise Linux 7Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat OpenShift AI (RHOAI)Red Hat OpenShift Dev Spaces

Fix Status

✅ Fix Available

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 cve.org 🔗 github.com