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Vulnerabilities CVE-2026-48758

CVE-2026-48758

Medium
Open
TLP:CLEAR

sigstore-js: DSSE payloadType type-binding failure

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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.

Details

CVSS Score
5.4
EPSS Score
0.20%

9.7th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Confidence
90%
Published
Jul 14, 2026
Last Modified
Jul 15, 2026
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