CVE-2026-48758

Published: Jul 14, 2026Modified: Jul 15, 2026Deferred

5.4

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Exploitability: 2.8 / Impact: 2.5

Source: security-advisories@github.com (Secondary)

Description

sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 3.2.1, the preAuthEncoding function in @sigstore/core uses Node.js ascii encoding when converting the PAE string to bytes, allowing payloadType to be mutated after signing without invalidating the signature and breaking the type-binding guarantee that DSSE is designed to provide. This issue is fixed in version 3.2.1.

Related CWEs

CWE-347

Improper Verification of Cryptographic Signature

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

References (5)

https://github.com/sigstore/sigstore-js/commit/b5aa4f1f8d2db0a9dfa6430fb114d9c2f1c304f7

Source: security-advisories@github.com

https://github.com/sigstore/sigstore-js/pull/1657

Source: security-advisories@github.com

https://github.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Fcore%403.2.1

Source: security-advisories@github.com

https://github.com/sigstore/sigstore-js/security/advisories/GHSA-jfc7-64v2-mr8c

Source: security-advisories@github.com

https://github.com/sigstore/sigstore-js/security/advisories/GHSA-jfc7-64v2-mr8c

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

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