Sigstore Java has a vulnerability with bundle verification of integratedTime

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-48791
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-13 00:17:32 UTC
Updated2026-08-13 13:19:09 UTC
Descriptionsigstore-java is a sigstore java client for interacting with sigstore infrastructure. Version 2.0.0 erroneously removed verification of the integrated (Rekor entry) time) against the Fulcio certificate. Version 2.1.0 re-added this verification with enhancements that adhere to the Sigstore verification spec. The old sigstore-conformance test for this check was built incorrectly. This vulnerability impacts only users verifying bundles with `dev.sigstore:sigstore-java:2.0.0`. Older versions are not affected; it is fixed in `dev.sigstore:sigstore-java:2.1.0` A malicious actor may exploit this if they were able to access a users system and exfiltrate the temporary private key used during signing and then reuse an old fulcio certificate later without requiring direct access to the user's credentials. Users may protect themselves by re-verifying their artifacts using the newest sigstore-java or another current sigstore client. Transparency logs may also be audited for unauthorized signatures for a suspected reused identity.

Risk And Classification

Primary CVSS: v3.1 2 LOW from [email protected]

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

EPSS: 0.000560000 probability, percentile 0.000040000 (date 2026-08-14)

Problem Types: CWE-347 | CWE-347 CWE-347: Improper Verification of Cryptographic Signature

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary2LOWCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
3.1CNADECLARED2LOWCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Sigstore Sigstore-java affected = 2.0.0 Not specified

References

ReferenceSourceLinkTags
github.com/sigstore/sigstore-java/commit/b529335728fc5cfb574161b4b3c0685... [email protected] github.com
github.com/sigstore/sigstore-java/security/advisories/GHSA-qqw8-7c2r-jxch 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/sigstore/sigstore-java/pull/1008 [email protected] github.com
github.com/sigstore/sigstore-java/commit/4b7a49ebb1813f5b1ff113bcad63246... [email protected] github.com
github.com/sigstore/sigstore-java/pull/1185 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report