CVE-2026-81700

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-27. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

openssl_encrypt versions before 1.4.9 contain a signature verification vulnerability in gpg_runner.verify_detached that accepts revoked and expired keys by only checking VALIDSIG status without inspecting REVKEYSIG, EXPKEYSIG, or gpg exit codes. Attackers holding compromised-then-revoked signing keys or expired project keys can bypass signature verification to execute malicious plugins in the host process.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

August 27, 2026

Last Modified

September 1, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
Patch available. Sources: github.
generic

openssl_encrypt before 1.4.9 GPG Signature Verification Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-gpg-signature-verification-bypass
github Patch Available

GPG detached-signature verification accepts revoked and expired keys · Advisory · jahlives/openssl_encrypt · GitHub

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-x38r-8wf3-q9hq

Vendor Advisories for CVE-2026-81700(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)
PyPI(1)
PackageVulnerable rangeFixed inDependents
openssl-encrypt0.2.2 ... 1.4.8 (53 versions)1.4.9—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 54× in last 7d / 181× 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 181 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-81700?
CVE-2026-81700 is a critical vulnerability published on August 27, 2026. opensslencrypt versions before 1.4.9 contain a signature verification vulnerability in gpgrunner.verify_detached that accepts revoked and expired keys by only checking VALIDSIG status without inspecting REVKEYSIG, EXPKEYSIG, or gpg exit codes. Attackers holding compromised-then-revoked signing keys…
When was CVE-2026-81700 disclosed?
CVE-2026-81700 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-81700 actively exploited?
CVE-2026-81700 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 84.4% of all scored CVEs.
What is the CVSS score of CVE-2026-81700?
CVE-2026-81700 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-81700?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81700, 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-2026-81700

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