by Kastro
Paper/Archive/CVE-2026-81706

CVE-2026-81706

jahlives openssl_encrypt — openssl_encrypt before 1.4.9 Key Substitution via Identity Shadowing

EPSS 0.2%CVSS 9.3
critical.is priorityof 100
29
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 7.6.076 × 201.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
openssl_encrypt< 1.4.91.4.9CNA

Scores by source

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
VulnCheck (CNA)6.8CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

advisorygithub.com/jahlives/openssl_encrypt/security/advisories/GHSA-8gmx-w9m8-vx7qwriteupvulncheck.com/advisories/openssl-encrypt-before-1.4.9-key-substitution-via-identity-shadowing