CVE-2026-120634
No CVSS score yet. EPSS 0.2% estimated probability of exploitation activity in the next 30 days.
On this page
CGI::Carp versions before 5.00 for Perl leak warnings across requests in persistent environments via the warningsToBrowser buffer.
Warnings are held in a package-level buffer until warningsToBrowser writes them into the page as HTML comments, and the buffer is never cleared between requests. Under mod_perl, FastCGI or PSGI, warnings from one request are written into a later one.
Warnings that contain one user's request data can appear in the HTML sent to another user.
- 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-488 Exposure of Data Element to Wrong Session
- Published
- Modified
- Record from
- the NVD, synced
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Explain CVE-2026-120634 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-120634?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-120634?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-2026-120634 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-2026-120634 |
From the distributions' data via OSV.dev: the Debian Security Tracker. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian.
Attack patterns (CAPEC)
- CAPEC-59 Session Credential Falsification through Prediction Likelihood: High · Severity: High
- CAPEC-60 Reusing Session IDs (aka Session Replay) Likelihood: High · Severity: High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.