CVE-2026-4631

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-07. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 15%CVSS: 9.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

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.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
15%
EPSS %ILE
97%
KEV
Not listed

Published

April 7, 2026

Last Modified

August 4, 2026

Advisory Details (8)

Auto-updated Sep 1, 2026
Patch available. Sources: redhat, github.
github Patch Available

Unauthenticated remote code execution due to SSH command-line argument injection · Advisory · cockpit-project/cockpit · GitHub

https://github.com/cockpit-project/cockpit/security/advisories/GHSA-m4gv-x78h-3427
redhat Patch Available

2450246 – (CVE-2026-4631) CVE-2026-4631 cockpit: Cockpit: Unauthenticated remote code execution due to SSH command-line argument injection

https://bugzilla.redhat.com/show_bug.cgi?id=2450246
redhat Patch Available

CVE-2026-4631 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8, and Red Hat Enterprise Linux 9 before release 9.6, were not affected by this flaw.

https://access.redhat.com/security/cve/CVE-2026-4631
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:7384
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:7383
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.6 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:7382
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:7381
generic Patch Available

oss-security - CVE-2026-4631 [cockpit] Unauthenticated remote code execution due to SSH command-line argument injection

http://www.openwall.com/lists/oss-security/2026/04/10/5

Vendor Advisories for CVE-2026-4631(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatcockpit-0:334.1-3.el10_02026-04-10redhat
redhatcockpit-0:344-2.el9_72026-04-10redhat
redhatcockpit-0:334.2-2.el9_62026-04-10redhat
redhatcockpit-0:344-3.el10_12026-04-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
cockpit337-1337-1+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
cockpit337-1 ... 360-1~bpo13+1 (28 versions)360-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 99× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 254 total refreshes for this CVE.

  1. 2026-09-04 05:06 UTCEPSS rescore
  2. 2026-09-02 14:12 UTCEPSS rescore
  3. 2026-09-01 13:54 UTCEPSS rescore
  4. 2026-09-01 04:40 UTCEPSS rescore
  5. 2026-08-30 19:17 UTCEPSS rescore
  6. 2026-08-30 01:22 UTCEPSS rescore
  7. 2026-08-28 21:41 UTCEPSS rescore
  8. 2026-08-27 14:25 UTCEPSS rescore
  9. 2026-08-26 14:46 UTCEPSS rescore
  10. 2026-08-25 13:49 UTCEPSS rescore
  11. 2026-08-23 00:19 UTCEPSS rescore
  12. 2026-08-21 23:49 UTCEPSS rescore
  13. 2026-08-20 22:55 UTCEPSS rescore
  14. 2026-08-19 17:04 UTCEPSS rescore
  15. 2026-08-18 13:48 UTCEPSS rescore
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 11:39 UTCVendor advisory
  19. 2026-08-16 11:39 UTCGHSA enrichment
  20. 2026-08-16 07:59 UTCEG score recompute
  21. 2026-08-16 07:59 UTCVendor advisory
  22. 2026-08-16 07:59 UTCGHSA enrichment
  23. 2026-08-16 02:14 UTCEPSS rescore
  24. 2026-08-15 02:07 UTCEG score recompute
  25. 2026-08-15 02:07 UTCVendor advisory
Show 75 more
  1. 2026-08-15 02:07 UTCGHSA enrichment
  2. 2026-08-15 01:30 UTCEPSS rescore
  3. 2026-08-14 22:23 UTCVendor advisory
  4. 2026-08-14 22:23 UTCGHSA enrichment
  5. 2026-08-14 18:32 UTCVendor advisory
  6. 2026-08-14 18:32 UTCGHSA enrichment
  7. 2026-08-14 12:45 UTCVendor advisory
  8. 2026-08-14 12:45 UTCGHSA enrichment
  9. 2026-08-14 09:05 UTCVendor advisory
  10. 2026-08-14 09:05 UTCGHSA enrichment
  11. 2026-08-14 05:25 UTCEG score recompute
  12. 2026-08-14 05:25 UTCVendor advisory
  13. 2026-08-14 05:25 UTCGHSA enrichment
  14. 2026-08-13 22:00 UTCEPSS rescore
  15. 2026-08-13 09:39 UTCVendor advisory
  16. 2026-08-13 09:39 UTCGHSA enrichment
  17. 2026-08-13 02:59 UTCVendor advisory
  18. 2026-08-13 02:59 UTCGHSA enrichment
  19. 2026-08-12 23:19 UTCVendor advisory
  20. 2026-08-12 23:19 UTCGHSA enrichment
  21. 2026-08-12 19:39 UTCEG score recompute
  22. 2026-08-12 19:39 UTCVendor advisory
  23. 2026-08-12 19:39 UTCGHSA enrichment
  24. 2026-08-12 13:51 UTCEPSS rescore
  25. 2026-08-11 23:32 UTCVendor advisory
  26. 2026-08-11 23:32 UTCGHSA enrichment
  27. 2026-08-11 19:52 UTCEG score recompute
  28. 2026-08-11 19:52 UTCVendor advisory
  29. 2026-08-11 19:52 UTCGHSA enrichment
  30. 2026-08-11 06:53 UTCVendor advisory
  31. 2026-08-11 06:53 UTCGHSA enrichment
  32. 2026-08-11 03:13 UTCVendor advisory
  33. 2026-08-11 03:13 UTCGHSA enrichment
  34. 2026-08-10 11:56 UTCVendor advisory
  35. 2026-08-10 11:56 UTCGHSA enrichment
  36. 2026-08-10 07:15 UTCVendor advisory
  37. 2026-08-10 07:15 UTCGHSA enrichment
  38. 2026-08-10 03:35 UTCVendor advisory
  39. 2026-08-10 03:35 UTCGHSA enrichment
  40. 2026-08-09 23:55 UTCVendor advisory
  41. 2026-08-09 23:55 UTCGHSA enrichment
  42. 2026-08-09 20:15 UTCVendor advisory
  43. 2026-08-09 20:15 UTCGHSA enrichment
  44. 2026-08-09 16:35 UTCVendor advisory
  45. 2026-08-09 16:35 UTCGHSA enrichment
  46. 2026-08-09 12:55 UTCVendor advisory
  47. 2026-08-09 12:55 UTCGHSA enrichment
  48. 2026-08-09 08:36 UTCVendor advisory
  49. 2026-08-09 08:36 UTCGHSA enrichment
  50. 2026-08-09 04:56 UTCEG score recompute
  51. 2026-08-09 04:56 UTCVendor advisory
  52. 2026-08-09 04:56 UTCGHSA enrichment
  53. 2026-08-08 16:37 UTCEPSS rescore
  54. 2026-08-08 09:37 UTCVendor advisory
  55. 2026-08-08 09:37 UTCGHSA enrichment
  56. 2026-08-08 05:57 UTCVendor advisory
  57. 2026-08-08 05:57 UTCGHSA enrichment
  58. 2026-08-08 02:17 UTCVendor advisory
  59. 2026-08-08 02:17 UTCGHSA enrichment
  60. 2026-08-07 22:37 UTCVendor advisory
  61. 2026-08-07 22:37 UTCGHSA enrichment
  62. 2026-08-07 18:56 UTCEG score recompute
  63. 2026-08-07 18:56 UTCVendor advisory
  64. 2026-08-07 18:56 UTCGHSA enrichment
  65. 2026-08-07 14:55 UTCVendor advisory
  66. 2026-08-07 14:55 UTCGHSA enrichment
  67. 2026-08-06 17:36 UTCEG score recompute
  68. 2026-08-06 17:36 UTCVendor advisory
  69. 2026-08-06 17:36 UTCGHSA enrichment
  70. 2026-08-06 13:47 UTCEPSS rescore
  71. 2026-08-06 12:57 UTCVendor advisory
  72. 2026-08-06 12:57 UTCGHSA enrichment
  73. 2026-08-06 07:19 UTCVendor advisory
  74. 2026-08-06 07:19 UTCGHSA enrichment
  75. 2026-08-06 03:39 UTCVendor advisory

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 GitHub PoC) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-52572
    First seen May 21, 2026

    Cockpit 359 - RCE

    Open source ↗
  • GitHub PoCcyberheartmi9/CVE-2026-4631-cockpit-RCE
    First seen Apr 18, 2026

    Cockpit: Unauthenticated Remote Code Execution via SSH Command-Line Argument Injection

    Open source ↗
  • Nucleihttp/cves/2026/CVE-2026-4631.yaml
    First seen Jan 1, 2026

    Cockpit Web Console < 360 - Remote Code Execution

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-4631?
CVE-2026-4631 is a critical vulnerability published on April 7, 2026. 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…
When was CVE-2026-4631 disclosed?
CVE-2026-4631 was first published in the National Vulnerability Database on April 7, 2026, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4631 actively exploited?
CVE-2026-4631 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15% probability of exploitation in the next 30 days, which ranks it in the top 3.4% of all scored CVEs.
What is the CVSS score of CVE-2026-4631?
CVE-2026-4631 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-4631?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4631, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-4631

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