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CVE record · CVE-2026-50722

IKEv2 Denial of Service via RSA-SHA1 (PKCS#1 RSASSA-PKCS1-v1_5) authentication payload

CVSS 7.5 HighEPSS 0.0035 · 28th percentile

Published by the CVE Program (CNA: libreswan) at 2 Jul 2026, 21:34 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
VendorProductVersions
The Libreswan Project libreswan Package name: libreswan https://github.com/libreswan/libreswan
  • affected 5.3 and earlier semver
  • unaffected 5.3.1 semver
Other versions: unaffected
Identifiers
CVE-2026-50722
CNA
libreswan
Weakness (CWE)
CWE-347 · CWE-617
Tags
Published
2 Jul 2026
Updated
7 Jul 2026

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

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (libreswan)Used for this record
8.1 High 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CNA (libreswan)
  • CISA KEV Not listed.
  • EPSS 0.0035, the 28th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 2 Jul 2026. New records show when each source confirmed them.

Sources

References from the CNA

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.