UBUNTU-CVE-2026-120651
Dashboard / Vulnerabilities / UBUNTU-CVE-2026-120651
Summary:
Details: CGI versions before 5.00 for Perl allow an infinite loop on a short request body when $DISABLE_UPLOADS is set. When $CGI::PUTDATA_UPLOAD or an upload hook is set, read_postdata_putdata takes a request body that is not a form submission. With $CGI::DISABLE_UPLOADS set, it discards the body by reading until Content-Length bytes have arrived. Once a body shorter than its Content-Length runs out, every read returns 0, so the loop never ends. A client can keep a server process spinning with one such request.
References: https://ubuntu.com/security/CVE-2026-120651, https://www.cve.org/CVERecord?id=CVE-2026-120651, https://lists.security.metacpan.org/cve-announce/msg/44875017/, https://github.com/leejo/CGI.pm/commit/16d9f61acf8b844b7360e8d726338e3ce34dfa9f, https://github.com/leejo/CGI.pm/commit/8a78305065690461ae283fa24e5ebe4ec8a22fbc, https://github.com/leejo/CGI.pm/commit/16d9f61acf8b844b7360e8d726338e3ce34dfa9f.patch, https://github.com/leejo/CGI.pm/commit/8a78305065690461ae283fa24e5ebe4ec8a22fbc.patch, https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm, https://metacpan.org/release/LEEJO/CGI-5.00/changes
Affected packages
Package
Name: libcgi-pm-perl
Purl: pkg:deb/ubuntu/libcgi-pm-perl?arch=source&distro=xenial
Affected ranges
Type: ECOSYSTEM
Events:
