Tauri framework v2 missing updater signature version number validation can be exploited into forced downgrade

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-95625
StatePUBLISHED
AssignerJFROG
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-23 09:17:09 UTC
Updated2026-09-23 19:42:02 UTC
DescriptionThe Tauri updater plugin verifies update binaries using minisign signatures, but the signature covers only the raw binary bytes. The update manifest -- which contains the version number, download URL, and signature -- is fetched over TLS but is never itself signed or authenticated. Because the only anti-rollback check compares the manifest's version field against the current version, and that field is unsigned, an attacker who can serve a crafted manifest can force installation of any older signed release without possessing the developer's private key.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

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

EPSS: 0.001560000 probability, percentile 0.040130000 (date 2026-09-24)

Problem Types: CWE-354 | CWE-354 CWE-354: Improper Validation of Integrity Check Value

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
3.1CNACVSS5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tauri Tauri-plugin-updater affected 2.0.0 2.12.0 semver Not specified
CNA Tauri Tauri-plugin-updater affected 2.12.0 * semver Not specified

References

ReferenceSourceLinkTags
github.com/tauri-apps/plugins-workspace/commit/690dcfd694 [email protected] github.com
github.com/tauri-apps/plugins-workspace [email protected] github.com
github.com/tauri-apps/plugins-workspace/security/advisories/GHSA-j38x-g3... [email protected] github.com
github.com/tauri-apps/plugins-workspace/releases/tag/updater-v2.12.0 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Yuval Moravchick (en)

CNA: JFrog Security Research (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-09-01T13:31:00.000ZReported to the Tauri team as GHSA-j38x-g3m3-95fr
CNA2026-09-19T23:57:00.000ZOpt-in fix released in tauri-plugin-updater 2.12.0, commit 690dcfd694, adding the requireSignedVersion option

Solutions

CNA: addressed in tauri-plugin-updater 2.12.0, and it has to be switched on. The new requireSignedVersion option compares the version announced by the endpoint against the version recorded in the signature's trusted comment, which the signature does cover, and rejects the update when they differ.

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