CVE-2026-116268 MIME::Field::ParamVal versions before 5.521 for Perl allow CPU exhaustion via unclosed comments in header parameters
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-116268?
CVE-2026-116268 is a vulnerability, published on 28 Oct 2026.
Official description
MIME::Field::ParamVal versions before 5.521 for Perl allow CPU exhaustion via unclosed comments in header parameters.
The comment pattern used to parse Content-Type and Content-Disposition parameters scans from each "(" to the next ")". In a field with no ")", every "(" scans to the end of the header and fails, so parsing takes time quadratic in the header length. The field is parsed again on each attribute lookup, several times per MIME entity.
A 40 KB header takes about 7 seconds to parse once.
Weakness: CWE-1333
Which versions are affected by CVE-2026-116268?
How do I fix CVE-2026-116268?
No fix has been published for CVE-2026-116268 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-116268 being exploited?
There is no known exploitation of CVE-2026-116268 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-116268, GHSA-cgxv-575f-wxjm, UBUNTU-CVE-2026-116268.