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Vulnerability · Published Nov 3, 2026 · Assigned by CPANSec

CVE-2026-120650CGI versions before 5.00 for Perl allow memory, CPU and disk exhaustion via missing or unenforced request size, parameter and upload limits

Unrated

In plain English

A resource allocation without limits in CGI. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 91.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

CGI versions before 5.00 for Perl allow memory, CPU and disk exhaustion via missing or unenforced request size, parameter and upload limits. $CGI::POST_MAX defaults to no limit, and when set is not enforced for chunked multipart bodies or for the boundary line of a multipart body without a boundary= parameter. Bodies saved as PUTDATA, POSTDATA or PATCHDATA uploads are read into memory in one go, and nothing limits the number of parameters or uploads.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libcgi-pm-perlno fix listedDEBIAN-CVE-2026-120650
Debian:13libcgi-pm-perlno fix listedDEBIAN-CVE-2026-120650
Debian:14libcgi-pm-perlno fix listedDEBIAN-CVE-2026-120650
Ubuntu:22.04:LTSlibcgi-pm-perlno fix listedUBUNTU-CVE-2026-120650
Ubuntu:24.04:LTSlibcgi-pm-perlno fix listedUBUNTU-CVE-2026-120650
Ubuntu:26.04:LTSlibcgi-pm-perlno fix listedUBUNTU-CVE-2026-120650
Ubuntu:26.10libcgi-pm-perlno fix listedUBUNTU-CVE-2026-120650

Affected products (as reported)

VendorProductVersions
CGI 0 – before 5.00

Weakness: CWE-770

References