CVE-2026-1299

ADVISORY - nist

Summary

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".

EPSS Score⁠: 0.00017 (0.030)

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-93⁠

Improper Neutralization of CRLF Sequences ('CRLF Injection')

Impacted images

Advisories

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