Bug 2548172

Summary: CVE-2026-93600 sandogasa: rustls-webpki: URI Name Constraint Bypass via X.509 Certificate Misissue [fedora-all]
Product: [Fedora] Fedora Reporter: Ganesh <gnaik>
Component: sandogasaAssignee: Michel Lind <michel>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: rawhideCC: michel, rust-sig
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["ab1878dc-6ee9-4241-bf74-8bb913187643"]}
Fixed In Version: sandogasa-0.11.1-1.fc43 sandogasa-0.11.1-1.fc44 sandogasa-0.10.2-1.fc45 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-10-13 16:10:41 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2443911, 2538296    

Description Ganesh 2026-10-08 18:50:11 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

rustls-webpki (rustls/webpki) versions 0.101.0 through 0.103.11 and 0.104.0-alpha releases before 0.104.0-alpha.6 ignore X.509 name constraints that apply to URI names, causing such constraints to be accepted rather than enforced. Because name constraints are restrictions on otherwise properly issued certificates, the flaw is only reachable after successful signature verification and requires a misissued certificate to exploit; the library also provides no API for asserting URI names, and URI name constraints are otherwise unimplemented. Versions 0.103.12 and 0.104.0-alpha.6 reject URI name constraints unconditionally.
Comment 1 Michel Lind 2026-10-13 16:10:41 UTC 
This bug is already fixed in published Bodhi updates, one per release it covers:
  sandogasa-0.11.1-1.fc43
  sandogasa-0.11.1-1.fc44
Comment 2 Michel Lind 2026-10-13 16:10:48 UTC 
This bug is already fixed in a published Bodhi update.
Comment 3 Michel Lind 2026-10-13 16:29:16 UTC 
Correcting the record: this bug covers every Fedora release, and f45 was affected and fixed too, but its update was left out of the close.

f45 shipped sandogasa built against a vulnerable rust-rustls-webpki from sandogasa-0.10.0-1.fc45 (0.103.10), and was fixed by:

  sandogasa-0.10.2-1.fc45 (FEDORA-2026-973dd9acec), built against 0.103.13

which is at or past the 0.103.12 the advisory records. Added to Fixed In alongside the f43 and f44 updates.

The omission was a transient failure querying Bodhi for F45, which the triage tool could not tell from a release with no updates; tracked as https://github.com/slopfest/sandogasa/issues/46 and since fixed.