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Vulnerability record · CVE-2026-81706 · published 27 August 2026

CVE-2026-81706: Jahlives openssl encrypt insufficient verification of data authenticity vulnerability

JJahlives · Openssl Encrypt

openssl_encrypt before 1.4.9 fails to prevent namespace collisions between own identities and contacts in IdentityStore, allowing attackers to create shadowed contact entries invisible until the corresponding own identity is deleted. When the own identity is deleted, the shadowed contact becomes visible and resolves to the attacker's keys, enabling silent key substitution for encrypted files.

9.3 CVSS 4.0 Critical EPSS 0.18% · top 93.1% CWE-345 · Insufficient verification of data authenticity
9.3CVSS 4.0 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
1 Sep 2026Last modified by NVD

Description

openssl_encrypt before 1.4.9 fails to prevent namespace collisions between own identities and contacts in IdentityStore, allowing attackers to create shadowed contact entries invisible until the corresponding own identity is deleted. When the own identity is deleted, the shadowed contact becomes visible and resolves to the attacker's keys, enabling silent key substitution for encrypted files.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-8gmx-w9m8-vx7q Vendor Advisory
https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-key-substitution-via-identity-shadowing Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-81706), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.