GHSA-539p-fxf4-7fv8: openssl-encrypt (CVE-2026-81696)

openssl_encrypt versions before 1.4.9 fail to sanitize terminal control characters in file metadata printed by the info command. Attackers can craft malicious files containing escape sequences to r...

CVSS 9.3 CriticalCriticalEPSS 0.0025 · 16th percentile

Critical, because:

CVSS score 9.3: 9.0 or more.

How we decide what’s critical

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-539p-fxf4-7fv8 · CVE-2026-81696 · PYSEC-2026-3775

Weakness (CWE)

CWE-117

Machine-written summary

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

The openssl-encrypt package, versions before 1.4.9, does not strip terminal control characters from file metadata shown by its info command. An attacker who can supply a crafted encrypted file can use escape sequences to alter what appears in the terminal, including forged verification details. Upgrade to version 1.4.9 or later. No other workaround is listed.

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
9.3	Critical	4.0	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	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0025, the 16th percentile, on 12 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.