CVE-2026-74876CWE-347

CVE-2026-74876

Critical · published August 17, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
27.2
In the wild
Unconfirmed
What it is

openssl_encrypt versions before 1.4.0 contain a vulnerability in PublicKeyBundle.from_dict() that creates key bundles from untrusted data without verifying signatures. Attackers can call from_dict() followed by to_identity() without signature verification to encrypt data using attacker-controlled public keys, leaking secrets.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.3 · 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
EPSS
0.00348 · 27.2th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2026-08-17T15:16Z
Affected products (1)
ProductVersionsFixed in
jahlives/openssl_encrypt< 1.4.01.4.0
References (2)
https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-8h88-gxp3-j7pg · [email protected]https://www.vulncheck.com/advisories/openssl-encrypt-before-unverified-key-bundle-encryption · [email protected]
EPSS history
Timeline
  • 17 AUG 11:04Z
    openssl_encrypt before 1.4.0 Unverified Key Bundle Encryption
    cvelistv5