CVE-2026-4631
Exploitation confirmed. First attested on 2026-07-08 by GCVE · kevintel, GCVE · shadowserver.
- Published2026-04-07
- WeaknessCWE-78
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Cockpit's remote login feature passes user-supplied hostnames and usernames from the web interface to the SSH client without validation or sanitization. An attacker with network access to the Cockpit web service can craft a single HTTP request to the login endpoint that injects malicious SSH options or shell commands, achieving code execution on the Cockpit host without valid credentials. The injection occurs during the authentication flow before any credential verification takes place, meaning no login is required to exploit the vulnerability.
Timeline
dates in UTC- 2026-04-0717:16CVE publishedNVD
- 2026-07-08Listed as exploited by GCVEGCVE
- 2026-07-08Exploitation first reportedGCVE
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-4631?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-4631?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- cockpitAlmaLinux:9all versions · fixed in 344-2.el9_7and 7 other packages
- cockpit-docAlmaLinux:10all versions · fixed in 344-3.el10_1and 4 other packages
Fix
No fix published by the sources we read yet. NVD record
Detection
read 2026-10-23 19:25 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- 2 repositories, unverifiedcyberheartmi9/CVE-2026-4631-cockpit-RCEExDev994/CVE-2026-4631-cockpit-RCE PoC-in-GitHub
Sources
- NVDCVE recordread 2026-10-23
- GCVEexploitation2026-07-08
- CISA-ADPSSVC decisionnone2026-04-08
- OpenCVESSVC decisionnone—
- CNACVSS 3.19.8read 2026-10-23
- CNAweakness (CWE)CWE-78read 2026-10-23
- FIRST EPSSEPSS score9.2 %2026-10-22
- PoC-in-GitHubproof of concept2read 2026-10-23
- OSVaffected packages—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2026-04-07
- Last Modified
- 2026-10-15
- NVD status
- Awaiting Analysis
Frequently asked questions
What is CVE-2026-4631?
Is CVE-2026-4631 actively exploited?
What is the CVSS score for CVE-2026-4631?
Running cockpit? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Go further
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.