CVE-2026-120637
No CVSS score yet. EPSS 0.2% estimated probability of exploitation activity in the next 30 days.
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CGI versions before 5.00 for Perl take request parameters from the process command line arguments for an unrecognised REQUEST_METHOD.
For a REQUEST_METHOD such as OPTIONS, CGI falls through to its offline debugging mode, which is on by default, and builds the parameters and path_info from the process's command line arguments.
- EPSS
- 0.2% estimated probability of exploitation activity in the next 30 days; 9th percentile. Scored 2026-11-04. A forecast for this CVE across the internet, not for your own systems.
- CWE
- CWE-489 Active Debug Code
- OWASP Top 10
- A02:2025 Security Misconfiguration
- Published
- Modified
- Record from
- the NVD, synced
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Explain CVE-2026-120637 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-120637?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-120637?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-120637 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Debian | 12, 13, 14 | libcgi-pm-perl | no fix listed | DEBIAN-CVE-2026-120637 |
| Ubuntu | 16.04:LTS, 18.04:LTS, 20.04:LTS and 4 more | libcgi-pm-perl | no fix listed | UBUNTU-CVE-2026-120637 |
From the distributions' data via OSV.dev: the Debian Security Tracker; Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian · Ubuntu.
Attack patterns (CAPEC)
- CAPEC-121 Exploit Non-Production Interfaces Likelihood: Low · Severity: High
- CAPEC-661 Root/Jailbreak Detection Evasion via Debugging Likelihood: Medium · Severity: Very High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.