CVE-2026-120645
CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list
CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list.
When rendering option groups, scrolling_list marks the selected options by interpolating each selected value, by default taken from the request parameters, unescaped into a substitution pattern.
A client can make the request die with an invalid pattern, or tie up the process with one that backtracks heavily.
Exploit likelihood
What each source reports
CVE List No score
CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list
CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list.
When rendering option groups, scrolling_list marks the selected options by interpolating each selected value, by default taken from the request parameters, unescaped into a substitution pattern.
A client can make the request die with an invalid pattern, or tie up the process with one that backtracks heavily.
- Record
CVE-2026-120645- Weakness
- CWE-1333, CWE-625
- Updated
- 2026-11-04
EUVDEUVD-2026-116612 No score
CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list.
When rendering option groups, scrolling_list marks the selected options by interpolating each selected value, by default taken from the request parameters, unescaped into a substitution pattern.
A client can make the request die with an invalid pattern, or tie up the process with one that backtracks heavily.
- Record
EUVD-2026-116612- Updated
- 2026-11-04
GitHub AdvisoriesGHSA-8xqm-fm8j-xv84 No score
CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex...
CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list.
When rendering option groups, scrolling_list marks the selected options by interpolating each selected value, by default taken from the request parameters, unescaped into a substitution pattern.
A client can make the request die with an invalid pattern, or tie up the process with one that backtracks heavily.
- Record
GHSA-8xqm-fm8j-xv84- Weakness
- CWE-625
- Updated
- 2026-11-04
NVD No score
CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list.
When rendering option groups, scrolling_list marks the selected options by interpolating each selected value, by default taken from the request parameters, unescaped into a substitution pattern.
A client can make the request die with an invalid pattern, or tie up the process with one that backtracks heavily.
- Record
CVE-2026-120645- Weakness
- CWE-625, CWE-1333
- Updated
- 2026-11-04
OSVAZL-112759 No score
CVE-2026-120645 affecting package perl-CGI 4.60-1
CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list.
When rendering option groups, scrolling_list marks the selected options by interpolating each selected value, by default taken from the request parameters, unescaped into a substitution pattern.
A client can make the request die with an invalid pattern, or tie up the process with one that backtracks heavily.
- Record
AZL-112759- Updated
- 2026-11-07
OSV No score
CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list
CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list.
When rendering option groups, scrolling_list marks the selected options by interpolating each selected value, by default taken from the request parameters, unescaped into a substitution pattern.
A client can make the request die with an invalid pattern, or tie up the process with one that backtracks heavily.
- Record
CVE-2026-120645- Weakness
- CWE-1333, CWE-625
- Updated
- 2026-11-07
OSVDEBIAN-CVE-2026-120645 No score
CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list. When rendering option groups, scrolling_list marks the selected options by interpolating each selected value, by default taken from the request parameters, unescaped into a substitution pattern. A client can make the request die with an invalid pattern, or tie up the process with one that backtracks heavily.
- Record
DEBIAN-CVE-2026-120645- Updated
- 2026-11-05
OSVopenSUSE-SU-2026:12465-1 No score
perl-CGI-5.20.0-1.1 on GA media
These are all security issues fixed in the perl-CGI-5.20.0-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2026:12465-1- Updated
- 2026-11-07
OSVUBUNTU-CVE-2026-120645 No score
CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list. When rendering option groups, scrolling_list marks the selected options by interpolating each selected value, by default taken from the request parameters, unescaped into a substitution pattern. A client can make the request die with an invalid pattern, or tie up the process with one that backtracks heavily.
- Record
UBUNTU-CVE-2026-120645- Updated
- 2026-11-05
Affected packages
| Package | Affected | Fixed |
|---|---|---|
perl-CGIAzure Linux:3 |
through 4.60-1 | None known |
libcgi-pm-perlDebian:12 |
All versions, plus listed versions 4.55-14.57-14.59-14.60-14.61-1 Show 11 moreShow less4.62-14.63-14.64-14.65-14.66-14.67-14.68-14.70-14.71-14.72-15.02-1 |
None known |
libcgi-pm-perlDebian:13 |
All versions, plus listed versions 4.68-14.70-14.71-14.72-15.02-1 |
None known |
libcgi-pm-perlDebian:14 |
All versions, plus listed versions 4.68-14.70-14.71-14.72-15.02-1 |
None known |
libcgi-pm-perlUbuntu:16.04:LTS |
All versions, plus listed versions 4.21-14.22-14.25-14.26-1 |
None known |
libcgi-pm-perlUbuntu:18.04:LTS |
All versions, plus listed versions 4.36-14.37-14.38-1 |
None known |
libcgi-pm-perlUbuntu:20.04:LTS |
All versions, plus listed versions 4.44-14.45-14.46-1 |
None known |
libcgi-pm-perlUbuntu:22.04:LTS |
All versions, plus listed versions 4.51-14.53-14.54-1 |
None known |
libcgi-pm-perlUbuntu:24.04:LTS |
All versions, plus listed versions 4.57-14.60-14.61-14.62-14.63-1 |
None known |
libcgi-pm-perlUbuntu:26.10 |
All versions, plus listed versions 4.71-1build14.72-1 |
None known |
libcgi-pm-perlUbuntu:26.04:LTS |
All versions, plus listed versions 4.68-14.71-14.71-1build1 |
None known |
perl-CGIopenSUSE:Tumbleweed From an advisory covering 20 CVEs |
before 5.20.0-1.1 | 5.20.0-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| affected, aliases, references | OSV | |
| affected, aliases, references | NVD, OSV | |
| references | OSV | |
| affected, aliases, references | OSV | |
| aliases | EUVD, NVD | |
| first indexed | CVE List, GitHub Advisories |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-120645 is a vulnerability with no CVSS score yet in perl-CGI, published November 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 33rd percentile. No source names a fixed version.
References
metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm
metacpan.org/release/LEEJO/CGI-5.00/changes
github.com/leejo/CGI.pm/commit/824956fbb0c4eb77044ba2dc9180a30df12cb309.patch
nvd.nist.gov/vuln/detail/CVE-2026-120645
github.com/advisories/GHSA-8xqm-fm8j-xv84
cpan.org/modules
Show 27 moreShow less
github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120645.json
github.com/leejo/CGI.pm
security-tracker.debian.org/tracker/CVE-2026-120645
ubuntu.com/security/CVE-2026-120645
cve.org/CVERecord?id=CVE-2026-120645
lists.security.metacpan.org/cve-announce/msg/44875001
github.com/leejo/CGI.pm/commit/824956fbb0c4eb77044ba2dc9180a30df12cb309
suse.com/security/cve/CVE-2026-120631
suse.com/security/cve/CVE-2026-120632
suse.com/security/cve/CVE-2026-120633
suse.com/security/cve/CVE-2026-120634
suse.com/security/cve/CVE-2026-120635
suse.com/security/cve/CVE-2026-120636
suse.com/security/cve/CVE-2026-120637
suse.com/security/cve/CVE-2026-120638
suse.com/security/cve/CVE-2026-120639
suse.com/security/cve/CVE-2026-120640
suse.com/security/cve/CVE-2026-120641
suse.com/security/cve/CVE-2026-120642
suse.com/security/cve/CVE-2026-120643
suse.com/security/cve/CVE-2026-120644
suse.com/security/cve/CVE-2026-120645
suse.com/security/cve/CVE-2026-120646
suse.com/security/cve/CVE-2026-120647
suse.com/security/cve/CVE-2026-120648
suse.com/security/cve/CVE-2026-120650
suse.com/security/cve/CVE-2026-120651