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CVE-2026-120646

CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo

No score

CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo.

uploadInfo dereferences its argument and calls its filename method without checking that it is an upload filehandle. A plain string naming a defined global variable, such as the parameter value from ?upload=0, is treated as a symbolic reference, and the method call on it dies.

Exploit likelihood

0.18%Unchanged since Nov 4, 2026
90%50%10%1%

What each source reports

CVE List No score

CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo

CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo.

uploadInfo dereferences its argument and calls its filename method without checking that it is an upload filehandle. A plain string naming a defined global variable, such as the parameter value from ?upload=0, is treated as a symbolic reference, and the method call on it dies.

Record
CVE-2026-120646
Weakness
CWE-843
Updated
2026-11-04
EUVDEUVD-2026-116613 No score

CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo.

uploadInfo dereferences its argument and calls its filename method without checking that it is an upload filehandle. A plain string naming a defined global variable, such as the parameter value from ?upload=0, is treated as a symbolic reference, and the method call on it dies.

Record
EUVD-2026-116613
Updated
2026-11-04
GitHub AdvisoriesGHSA-qfrv-79gg-33h6 No score

CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string...

CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo.

uploadInfo dereferences its argument and calls its filename method without checking that it is an upload filehandle. A plain string naming a defined global variable, such as the parameter value from ?upload=0, is treated as a symbolic reference, and the method call on it dies.

Record
GHSA-qfrv-79gg-33h6
Weakness
CWE-843
Updated
2026-11-04
NVD No score

CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo.

uploadInfo dereferences its argument and calls its filename method without checking that it is an upload filehandle. A plain string naming a defined global variable, such as the parameter value from ?upload=0, is treated as a symbolic reference, and the method call on it dies.

Record
CVE-2026-120646
Weakness
CWE-843
Updated
2026-11-04
OSV No score

CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo

CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo.

uploadInfo dereferences its argument and calls its filename method without checking that it is an upload filehandle. A plain string naming a defined global variable, such as the parameter value from ?upload=0, is treated as a symbolic reference, and the method call on it dies.

Record
CVE-2026-120646
Weakness
CWE-843
Updated
2026-11-07
OSVDEBIAN-CVE-2026-120646 No score

CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo. uploadInfo dereferences its argument and calls its filename method without checking that it is an upload filehandle. A plain string naming a defined global variable, such as the parameter value from ?upload=0, is treated as a symbolic reference, and the method call on it dies.

Record
DEBIAN-CVE-2026-120646
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-2026-120646 No score

CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo. uploadInfo dereferences its argument and calls its filename method without checking that it is an upload filehandle. A plain string naming a defined global variable, such as the parameter value from ?upload=0, is treated as a symbolic reference, and the method call on it dies.

Record
UBUNTU-CVE-2026-120646
Updated
2026-11-05

Affected packages

Affected packages
PackageAffectedFixed
libcgi-pm-perl
Debian:12
All versions, plus listed versions
4.55-14.57-14.59-14.60-14.61-1
Show 11 moreShow less
4.62-14.63-14.64-14.65-14.66-14.67-14.68-14.70-14.71-14.72-15.02-1
None known
libcgi-pm-perl
Debian:13
All versions, plus listed versions
4.68-14.70-14.71-14.72-15.02-1
None known
libcgi-pm-perl
Debian:14
All versions, plus listed versions
4.68-14.70-14.71-14.72-15.02-1
None known
libcgi-pm-perl
Ubuntu:16.04:LTS
All versions, plus listed versions
4.21-14.22-14.25-14.26-1
None known
libcgi-pm-perl
Ubuntu:18.04:LTS
All versions, plus listed versions
4.36-14.37-14.38-1
None known
libcgi-pm-perl
Ubuntu:20.04:LTS
All versions, plus listed versions
4.44-14.45-14.46-1
None known
libcgi-pm-perl
Ubuntu:22.04:LTS
All versions, plus listed versions
4.51-14.53-14.54-1
None known
libcgi-pm-perl
Ubuntu:24.04:LTS
All versions, plus listed versions
4.57-14.60-14.61-14.62-14.63-1
None known
libcgi-pm-perl
Ubuntu:26.10
All versions, plus listed versions
4.71-1build14.72-1
None known
libcgi-pm-perl
Ubuntu:26.04:LTS
All versions, plus listed versions
4.68-14.71-14.71-1build1
None known
perl-CGI
openSUSE:Tumbleweed
From an advisory covering 20 CVEs
before 5.20.0-1.1
5.20.0-1.1

History

History
RecordedChangedSources
affected, aliases, referencesOSV
affected, aliases, referencesNVD, OSV
referencesOSV
affected, aliases, referencesOSV
aliasesEUVD, NVD
first indexedCVE List, GitHub Advisories

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-120646 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 0.18%, the 7th percentile. No source names a fixed version.

References

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