CVE-2026-1299 — email BytesGenerator header injection due to unquoted newlines
The email module, specifically the "BytesGenerator" class, didn’t properly quote newlines for email headers when serializing an email message allowing for header injection whe…
Published: 2026-01-23 · CVSS: 6.0 · CVSS 4.0
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".
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7