CVE-2026-81691

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-27. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: 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 fail to validate server URLs in login and register_with_email functions, accepting unencrypted http:// URLs and unconfigured hosts. Attackers on the network path can intercept cleartext credentials including client_id, passwords, and JWTs to achieve full keyserver account takeover.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

August 27, 2026

Last Modified

September 2, 2026

Advisory Details (2)

Auto-updated Aug 27, 2026
Patch available. Sources: github.
generic

openssl_encrypt before 1.4.9 Credential Leakage via Unvalidated Server URLs | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-credential-leakage-via-unvalidated-server-urls
github Patch Available

keyserver login/register_with_email accept http:// and unconfigured server URLs, leaking credentials · Advisory · jahlives/openssl_encrypt · GitHub

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-xr64-hcxg-4ghr

Vendor Advisories for CVE-2026-81691(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 25× in last 7d / 85× 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.

  1. 2026-09-19 04:13 UTCEG score recompute
  2. 2026-09-19 04:13 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 15:29 UTCGHSA enrichment
  5. 2026-09-18 02:46 UTCEG score recompute
  6. 2026-09-18 02:46 UTCGHSA enrichment
  7. 2026-09-17 14:02 UTCGHSA enrichment
  8. 2026-09-17 01:18 UTCEG score recompute
  9. 2026-09-17 01:18 UTCGHSA enrichment
  10. 2026-09-16 14:08 UTCEPSS rescore
  11. 2026-09-16 12:34 UTCEG score recompute
  12. 2026-09-16 12:34 UTCGHSA enrichment
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-15 23:51 UTCGHSA enrichment
  15. 2026-09-15 11:07 UTCEG score recompute
  16. 2026-09-15 11:07 UTCGHSA enrichment
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-14 21:53 UTCGHSA enrichment
  20. 2026-09-14 09:09 UTCGHSA enrichment
  21. 2026-09-13 20:25 UTCEG score recompute
  22. 2026-09-13 20:25 UTCGHSA enrichment
  23. 2026-09-13 07:41 UTCGHSA enrichment
  24. 2026-09-12 18:58 UTCEG score recompute
  25. 2026-09-12 18:58 UTCGHSA enrichment
Show 60 more
  1. 2026-09-12 06:14 UTCGHSA enrichment
  2. 2026-09-11 17:29 UTCEG score recompute
  3. 2026-09-11 17:29 UTCGHSA enrichment
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-11 14:53 UTCEPSS rescore
  6. 2026-09-11 04:19 UTCGHSA enrichment
  7. 2026-09-10 15:35 UTCEG score recompute
  8. 2026-09-10 15:35 UTCGHSA enrichment
  9. 2026-09-10 02:33 UTCGHSA enrichment
  10. 2026-09-09 13:49 UTCGHSA enrichment
  11. 2026-09-09 00:41 UTCEG score recompute
  12. 2026-09-09 00:41 UTCGHSA enrichment
  13. 2026-09-08 22:01 UTCEPSS rescore
  14. 2026-09-08 11:21 UTCGHSA enrichment
  15. 2026-09-07 20:49 UTCEG score recompute
  16. 2026-09-07 20:49 UTCGHSA enrichment
  17. 2026-09-07 08:05 UTCGHSA enrichment
  18. 2026-09-06 19:13 UTCEG score recompute
  19. 2026-09-06 19:13 UTCGHSA enrichment
  20. 2026-09-06 13:48 UTCEPSS rescore
  21. 2026-09-06 06:29 UTCGHSA enrichment
  22. 2026-09-05 17:45 UTCEG score recompute
  23. 2026-09-05 17:45 UTCGHSA enrichment
  24. 2026-09-05 15:31 UTCEPSS rescore
  25. 2026-09-05 05:01 UTCGHSA enrichment
  26. 2026-09-04 16:18 UTCEG score recompute
  27. 2026-09-04 16:18 UTCGHSA enrichment
  28. 2026-09-04 05:07 UTCEPSS rescore
  29. 2026-09-04 03:35 UTCGHSA enrichment
  30. 2026-09-03 14:45 UTCGHSA enrichment
  31. 2026-09-03 01:57 UTCEG score recompute
  32. 2026-09-03 01:57 UTCGHSA enrichment
  33. 2026-09-02 14:12 UTCEPSS rescore
  34. 2026-09-02 13:13 UTCGHSA enrichment
  35. 2026-09-02 00:54 UTCEG score recompute
  36. 2026-09-02 00:54 UTCGHSA enrichment
  37. 2026-09-01 13:54 UTCEPSS rescore
  38. 2026-09-01 12:11 UTCGHSA enrichment
  39. 2026-08-31 23:26 UTCGHSA enrichment
  40. 2026-08-31 10:42 UTCGHSA enrichment
  41. 2026-08-30 21:59 UTCEG score recompute
  42. 2026-08-30 21:59 UTCGHSA enrichment
  43. 2026-08-30 19:18 UTCEPSS rescore
  44. 2026-08-30 19:17 UTCEPSS rescore
  45. 2026-08-30 09:16 UTCEG score recompute
  46. 2026-08-30 09:15 UTCGHSA enrichment
  47. 2026-08-30 01:22 UTCEPSS rescore
  48. 2026-08-29 20:31 UTCGHSA enrichment
  49. 2026-08-29 07:47 UTCEG score recompute
  50. 2026-08-29 07:47 UTCGHSA enrichment
  51. 2026-08-28 21:42 UTCEPSS rescore
  52. 2026-08-28 19:03 UTCGHSA enrichment
  53. 2026-08-28 09:14 UTCGHSA enrichment
  54. 2026-08-27 20:27 UTCEG score recompute
  55. 2026-08-27 20:27 UTCGHSA enrichment
  56. 2026-08-27 20:18 UTCEG score recompute
  57. 2026-08-27 20:18 UTCGHSA enrichment
  58. 2026-08-27 17:25 UTCEG score recompute
  59. 2026-08-27 16:47 UTCEG score recompute
  60. 2026-08-27 16:43 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-81691?
CVE-2026-81691 is a high vulnerability published on August 27, 2026. opensslencrypt versions before 1.4.9 fail to validate server URLs in login and registerwithemail functions, accepting unencrypted http:// URLs and unconfigured hosts. Attackers on the network path can intercept cleartext credentials including clientid, passwords, and JWTs to achieve full keyserver…
When was CVE-2026-81691 disclosed?
CVE-2026-81691 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on September 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-81691 actively exploited?
CVE-2026-81691 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 90.1% of all scored CVEs.
What is the CVSS score of CVE-2026-81691?
CVE-2026-81691 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-81691?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81691, 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-2026-81691

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