Security Advisory
CVE-2026-1299
CVE vulnerability detail — eXtreme Datacenter Security Operations
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 dont respect email folding rules, the new behavior will reject the incorrectly folded headers in "BytesGenerator".