Bug 2566593 (CVE-2026-120632) - CVE-2026-120632 perl-CGI: perl-CGI: Denial of Service via crafted multipart/related Content-Type header
Summary: CVE-2026-120632 perl-CGI: perl-CGI: Denial of Service via crafted multipart/r...
Keywords:
Status: NEW
Alias: CVE-2026-120632
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-03 23:51 UTC by OSIDB Bzimport
Modified: 2026-11-03 23:58 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-11-03 23:51:24 UTC 
CGI versions before 5.00 for Perl allow CPU exhaustion via a backtracking regex on the XForms multipart/related Content-Type.

When a POST Content-Type contains multipart/related, the boundary and start parameters are extracted with an unanchored pattern that puts .+ on either side of the boundary capture, which backtracks in cubic time on a header that does not match. No request body is needed.
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