CVE-2026-4631

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-07. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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: 14%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
14%
EPSS %ILE
96%
KEV
Not listed

Published

April 7, 2026

Last Modified

July 15, 2026

Advisory Details (7)

Auto-updated Jul 25, 2026
Patch available. Sources: redhat.
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
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-details

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

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 29× 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 122 total refreshes for this CVE.

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

Publicly available exploits

(2 references)

Working exploit code is in the public domain (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 ↗
  • 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 July 15, 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 14% probability of exploitation in the next 30 days, which ranks it in the top 3.8% of all scored CVEs.
What is the CVSS score of CVE-2026-4631?
CVE-2026-4631 has a CVSS v3 base score of 9.8 (NVD).
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

Explore the affected products and dependency analysis for CVE-2026-4631

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