CVE-2026-74900: openssl_encrypt before 1.4.0 Weak Shared Secret via PQC Simulation Mode
jahlives · openssl_encrypt
Fixed in 1.4.0 · Affected: jahlives openssl_encrypt before 1.4.0 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 47% of scored CVEs
DescriptionCVE.org
openssl_encrypt versions before 1.4.0 contain a critical vulnerability in pqc.py where KEM decapsulation failures silently fall back to simulation mode, generating a deterministic shared secret from only 16 bytes of the private key and publicly available encapsulated key data. Attackers who obtain 16 bytes of the private key can compute the shared secret and decrypt all ciphertext, as the fallback triggers on any KEM failure without raising an error.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- jahlives · openssl_encryptbefore 1.4.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- jahlives
- Published
- August 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-74900 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.