GHSA-xcf7-rvmh-g6q4: openssl (CVE-2023-53159)

Package	Ecosystem	Affected	Fixed in
openssl	crates.io	>=0.10.0, <0.10.55	0.10.55

Machine-written summary

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

The openssl crate versions from 0.10.0 before 0.10.55 are affected. When the X509VerifyParamRef::set_host function is passed an empty string, it calls strlen on it and reads memory until it reaches a NUL byte, causing a buffer over-read. The source gives few details about who can trigger this or what an attacker could gain. Upgrade to openssl 0.10.55 or later.

Written 8 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
4.5	Medium	3.1	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:L	CNA (mitre)

CISA KEV Not listed.
EPSS 0.0023, the 13th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 15:17 UTC First seen by agentprime
31 Oct 2026, 15:17 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.