CVE-2026-120643
CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url
CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url.
Both pass the URL through URI's canonical method, which leaves an apostrophe in the path raw and decodes the %27 that query parameter escaping produces, so an apostrophe in the request path or a parameter appears raw in the result.
An application that places the URL in a single-quoted HTML attribute or JavaScript string is open to cross-site scripting.
Exploit likelihood
What each source reports
CVE List No score
CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url
CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url.
Both pass the URL through URI's canonical method, which leaves an apostrophe in the path raw and decodes the %27 that query parameter escaping produces, so an apostrophe in the request path or a parameter appears raw in the result.
An application that places the URL in a single-quoted HTML attribute or JavaScript string is open to cross-site scripting.
- Record
CVE-2026-120643- Weakness
- CWE-79
- Updated
- 2026-11-04
EUVDEUVD-2026-116610 No score
CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url.
Both pass the URL through URI's canonical method, which leaves an apostrophe in the path raw and decodes the %27 that query parameter escaping produces, so an apostrophe in the request path or a parameter appears raw in the result.
An application that places the URL in a single-quoted HTML attribute or JavaScript string is open to cross-site scripting.
- Record
EUVD-2026-116610- Updated
- 2026-11-04
GitHub AdvisoriesGHSA-c4m8-3x4v-gcxr No score
CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in...
CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url.
Both pass the URL through URI's canonical method, which leaves an apostrophe in the path raw and decodes the %27 that query parameter escaping produces, so an apostrophe in the request path or a parameter appears raw in the result.
An application that places the URL in a single-quoted HTML attribute or JavaScript string is open to cross-site scripting.
- Record
GHSA-c4m8-3x4v-gcxr- Weakness
- CWE-79
- Updated
- 2026-11-04
NVD No score
CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url.
Both pass the URL through URI's canonical method, which leaves an apostrophe in the path raw and decodes the %27 that query parameter escaping produces, so an apostrophe in the request path or a parameter appears raw in the result.
An application that places the URL in a single-quoted HTML attribute or JavaScript string is open to cross-site scripting.
- Record
CVE-2026-120643- Weakness
- CWE-79
- Updated
- 2026-11-04
OSV No score
CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url
CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url.
Both pass the URL through URI's canonical method, which leaves an apostrophe in the path raw and decodes the %27 that query parameter escaping produces, so an apostrophe in the request path or a parameter appears raw in the result.
An application that places the URL in a single-quoted HTML attribute or JavaScript string is open to cross-site scripting.
- Record
CVE-2026-120643- Weakness
- CWE-79
- Updated
- 2026-11-07
OSVDEBIAN-CVE-2026-120643 No score
CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url. Both pass the URL through URI's canonical method, which leaves an apostrophe in the path raw and decodes the %27 that query parameter escaping produces, so an apostrophe in the request path or a parameter appears raw in the result. An application that places the URL in a single-quoted HTML attribute or JavaScript string is open to cross-site scripting.
- Record
DEBIAN-CVE-2026-120643- 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-2026-120643 No score
CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url. Both pass the URL through URI's canonical method, which leaves an apostrophe in the path raw and decodes the %27 that query parameter escaping produces, so an apostrophe in the request path or a parameter appears raw in the result. An application that places the URL in a single-quoted HTML attribute or JavaScript string is open to cross-site scripting.
- Record
UBUNTU-CVE-2026-120643- Updated
- 2026-11-05
Affected packages
| Package | Affected | Fixed |
|---|---|---|
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 | 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-2026-120643 is a vulnerability with no CVSS score yet in libcgi-pm-perl, published November 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.21%, the 11th 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/851430be84c4d0f350681814e1d7718b9959f2c2.patch
nvd.nist.gov/vuln/detail/CVE-2026-120643
github.com/advisories/GHSA-c4m8-3x4v-gcxr
cpan.org/modules
Show 27 moreShow less
github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120643.json
github.com/leejo/CGI.pm
security-tracker.debian.org/tracker/CVE-2026-120643
ubuntu.com/security/CVE-2026-120643
cve.org/CVERecord?id=CVE-2026-120643
lists.security.metacpan.org/cve-announce/msg/44874955
github.com/leejo/CGI.pm/commit/851430be84c4d0f350681814e1d7718b9959f2c2
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