https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-03T02:15:34.350654+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2026-1299 CVE-2026-1299 — email BytesGenerator header injection due to unquoted newlines 2026-10-03T02:15:34.368775+00:00

Affected: Python Software Foundation CPython

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".