CVE-2026-42765

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

Issue summary: When a partial-chain certificate verification is enabled together with OCSP response checking for the whole chain, a NULL dereference will happen if the verified chain does not have a self-signed trusted anchor, crashing the process.

Impact summary: A NULL pointer dereference can trigger a crash which leads to a Denial of Service for an application.

When performing OCSP response checking for certificates in the verification chain, the code always tries to access the next certificate as the issuer. There is a check for a self-signed certificate. However with the partial chain verification enabled when the chain does not have a self-signed trusted anchor, the issuer will be NULL for the last certificate in the chain. A NULL pointer dereference then happens.

This issue affects only applications which enable both OCSP verification of the certificate chain (X509_V_FLAG_OCSP_RESP_CHECK_ALL) and partial chain verification (X509_V_FLAG_PARTIAL_CHAIN) in the certificate verification. Both flags are disabled by default. For that reason, we have assigned Low severity to the issue.

No FIPS modules are affected by this issue as the affected code is outside the OpenSSL FIPS module boundary.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
33.7%
KEV
Not listed

Published

June 9, 2026

Last Modified

June 15, 2026

Advisory Details (3)

Auto-updated Jun 10, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic
https://openssl-library.org/news/secadv/20260609.txt
github_commit

commit eb345da18ce2 (openssl/openssl)

Fix landed in openssl/openssl commit eb345da18ce2 — awaiting tagged release

https://github.com/openssl/openssl/commit/eb345da18ce2216b2f3ade9c2bc23e068487fa97
github_commit

commit 14340b7fa1d4 (openssl/openssl)

Fix landed in openssl/openssl commit 14340b7fa1d4 — awaiting tagged release

https://github.com/openssl/openssl/commit/14340b7fa1d444615486bc137014b064e64ec334

Vendor Advisories for CVE-2026-42765(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 32× in last 7d / 129× 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 129 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42765?
CVE-2026-42765 is a high vulnerability published on June 9, 2026. Issue summary: When a partial-chain certificate verification is enabled together with OCSP response checking for the whole chain, a NULL dereference will happen if the verified chain does not have a self-signed trusted anchor, crashing the process. Impact summary: A NULL pointer dereference can…
When was CVE-2026-42765 disclosed?
CVE-2026-42765 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on June 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42765 actively exploited?
CVE-2026-42765 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 33.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42765?
CVE-2026-42765 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-42765?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42765, 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.

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