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.
CVE-2026-81691
HIGHPre-NVD 7.57.5—Trending — 3 sources updated this week
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: ghsa, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 7.5Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- 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 computedSeverity75% × 45%Exploitation0% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
Published
August 27, 2026
Last Modified
August 27, 2026
Advisory Details (2)
Auto-updated Aug 27, 2026Patch 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-urlsgithub 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-4ghrVendor 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.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× 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.
- 2026-08-27 20:27 UTCEG score recompute
- 2026-08-27 20:27 UTCGHSA enrichment
- 2026-08-27 20:18 UTCEG score recompute
- 2026-08-27 20:18 UTCGHSA enrichment
- 2026-08-27 17:25 UTCEG score recompute
- 2026-08-27 16:47 UTCEG score recompute
- 2026-08-27 16:43 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-319
Frequently asked(4)
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. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
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
Explore the affected products and dependency analysis for CVE-2026-81691
Is Your Infrastructure Affected by CVE-2026-81691?
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