CVE-2026-116265
CVE-2026-116265 · MIME::Field::ParamVal versions before 5.521 for Perl do not flag an ambiguous multipart boundary written as RFC 2231 continuations
This page contains facts from public vulnerability sources. Check the original advisory before updating.
MIME::Field::ParamVal versions before 5.521 for Perl do not flag an ambiguous multipart boundary written as RFC 2231 continuations. The boundary ambiguity checks look only at a plain boundary= parameter, and a boundary split into RFC 2231 sections (boundary*0=, boundary*1= and so on) is joined after they have run. A repeated section number is concatenated rather than reported as a duplicate. From version 5.518, an encoded word or trailing whitespace in such a boundary also goes unflagged, although multipart_boundary() decodes or strips it. A remote sender can make MIME::Parser split a message on a different boundary than other mail readers, hiding an attachment from a filter that relies on ambiguous_content() while the recipient's mail client shows it.
EPSS 0.2%
- Published
- Updated
Stack: system
Affected products and versions
libmime-tools-perl Debian:12
- Versions
- 5.510-1
- 5.510-2
- 5.510-3
- 5.512-1
- 5.513-1
- 5.514-1
- 5.515-1
- 5.517-1
- 5.518-1
- 5.519-1
- 5.520-1
- 5.522-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libmime-tools-perl Debian:13
- Versions
- 5.515-1
- 5.517-1
- 5.518-1
- 5.519-1
- 5.520-1
- 5.522-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libmime-tools-perl Debian:14
- Versions
- 5.515-1
- 5.517-1
- 5.518-1
- 5.519-1
- 5.520-1
- 5.522-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libmime-tools-perl Ubuntu:14.04:LTS
- Versions
- 5.503-1
- 5.504-1
- 5.505-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libmime-tools-perl Ubuntu:16.04:LTS
- Versions
- 5.505-1
- 5.507-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libmime-tools-perl Ubuntu:18.04:LTS
- Versions
- 5.508-1
- 5.509-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libmime-tools-perl Ubuntu:20.04:LTS
- Versions
- 5.509-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libmime-tools-perl Ubuntu:22.04:LTS
- Versions
- 5.509-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libmime-tools-perl Ubuntu:24.04:LTS
- Versions
- 5.510-3
- 5.512-1
- 5.513-1
- 5.514-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libmime-tools-perl Ubuntu:26.10
- Versions
- 5.517-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
libmime-tools-perl Ubuntu:26.04:LTS
- Versions
- 5.515-1
- 5.517-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published