Is CVE-2026-24122 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-24122, but active exploitation has not been confirmed.

Can CVE-2026-24122 be exploited remotely?

Yes. CVE-2026-24122 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-24122?

CVE-2026-24122 has a CVSS score of 3.7 (LOW) and an EPSS exploitation probability of 0.02%.

HOME VULNERABILITIESCVE-2026-24122

LOWPOC

CVE-2026-24122

CWE-295Published: February 19, 2026· Updated: Feb 20, 2026

3.7

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:3.0th

Official Description

Cosign provides code signing and transparency for containers and binaries. In versions 3.0.4 and below, an issuing certificate with a validity that expires before the leaf certificate will be considered valid during verification even if the provided timestamp would mean the issuing certificate should be considered expired. When verifying artifact signatures using a certificate, Cosign first verifies the certificate chain using the leaf certificate's "not before" timestamp and later checks expiry of the leaf certificate using either a signed timestamp provided by the Rekor transparency log or from a timestamp authority, or using the current time. The root and all issuing certificates are assumed to be valid during the leaf certificate's validity. There is no impact to users of the public Sigstore infrastructure. This may affect private deployments with customized PKIs. This issue has been fixed in version 3.0.5.

NVD Source

Technical Analysis

CVE-2026-24122 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A proof-of-concept (PoC) exploit exists for CVE-2026-24122. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.