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CVE-2026-48758

sigstore-js: DSSE payloadType type-binding failure

Published: Jul 14, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-347
5.4MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 90.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-347

Affected Products

sigstore
oss-projectaka cosign, rekor, gitsign
sigstore-jsOn-prem
Security Products / pki-crypto

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/sigstore/sigstore-js/commit/b5aa4f1f8d2db0a9dfa6430fb114d9c2f1c304f7
github.com
https://github.com/sigstore/sigstore-js/pull/1657
github.com
https://github.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Fcore%403.2.1
github.com
and 1 more references View all →

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