CVE-2026-118373: OpenBSD LibreSSL

LibreSSL ocspcheck through 4.4.0 Cleartext Transmission of OCSP Requests via url2host()

CVSS 6.3 MediumEPSS 0.0009 · 1st percentile

Published by the CVE Program (CNA: VulnCheck) at 28 Oct 2026, 02:03 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
OpenBSD	LibreSSL pkg:github/libressl/portable	affected 4.4.0 and earlier semver Other versions: unaffected

Identifiers

CVE-2026-118373

CNA

VulnCheck

Weakness (CWE)

CWE-319

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.3	Medium	4.0	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
3.7	Low	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0009, the 1st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

28 Oct 2026, 02:03 UTC Confirmed by the CVE List
28 Oct 2026, 03:17 UTC Confirmed by NVD

Sources

References from the CNA

github.com/openbsd/src/commit/0f7039667044d1cd252cc72134e499186da4da25 patch
github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/http.c#L299 technical-description
ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-4.4.0-relnotes.txt release-notes
github.com/libressl/portable product
www.vulncheck.com/advisories/libressl-ocspcheck-through-4.4.0-cleartext-transmission-of-ocsp-requests-via-url2host third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.