CVE-2026-53839

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-06-13. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

OpenClaw before 2026.5.7 contains a hostname validation vulnerability in retry endpoint checks that allows matching hostname prefixes instead of exact hostnames. Attackers can exploit this by crafting a hostname prefix resembling a trusted host to send authentication material to untrusted endpoints.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

June 12, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Jun 13, 2026
Patch available. Sources: github.
generic

OpenClaw < 2026.5.7 - Hostname Prefix Matching Bypass in Trusted Retry Endpoint Validation | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openclaw-hostname-prefix-matching-bypass-in-trusted-retry-endpoint-validation
github Patch Available

Trusted retry endpoint checks could match hostname prefixes · Advisory · openclaw/openclaw · GitHub

https://github.com/openclaw/openclaw/security/advisories/GHSA-77q5-rr5v-x43q

Vendor Advisories for CVE-2026-53839(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
openclaw—2026.5.7—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 76× 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 180 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-53839?
CVE-2026-53839 is a medium vulnerability published on June 12, 2026. OpenClaw before 2026.5.7 contains a hostname validation vulnerability in retry endpoint checks that allows matching hostname prefixes instead of exact hostnames. Attackers can exploit this by crafting a hostname prefix resembling a trusted host to send authentication material to untrusted endpoints.
When was CVE-2026-53839 disclosed?
CVE-2026-53839 was first published in the National Vulnerability Database on June 12, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53839 actively exploited?
CVE-2026-53839 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 82.0% of all scored CVEs.
What is the CVSS score of CVE-2026-53839?
CVE-2026-53839 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-53839?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53839, 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

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