GHSA-7c3q-gp4v-q29q: openssl-encrypt (CVE-2026-81688)

openssl_encrypt versions before 1.4.9 store an unkeyed SHA-256 hash of the plaintext in the cleartext file header metadata. Attackers can read this hash without the password to confirm guessed plai...

CVSS 8.7 HighEPSS 0.0027 · 19th percentile

Published by the GitHub Advisory Database at 27 Aug 2026, 17:20 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
openssl-encrypt	PyPI	<1.4.9	1.4.9

Identifiers

GHSA-7c3q-gp4v-q29q · CVE-2026-81688 · PYSEC-2026-3795

Weakness (CWE)

CWE-311

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

openssl-encrypt versions before 1.4.9 store an unkeyed SHA-256 hash of the plaintext in the cleartext header of encrypted files. An attacker who can read an encrypted file does not need the password to check guessed plaintexts offline or to tell when two separately encrypted files contain the same content. Upgrade to openssl-encrypt 1.4.9 or later, which is listed as the fixed version.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.7	High	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0027, the 19th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:38 UTC First seen by agentprime
31 Oct 2026, 14:38 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.