RUSTSEC-2026-0099

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Source

https://rustsec.org/advisories/RUSTSEC-2026-0099

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0099.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2026-0099

Aliases

GHSA-xgp8-3hg3-c2mh

Published

2026-04-14T12:00:00Z

Modified

2026-04-15T10:00:06.619583Z

Summary

Name constraints were accepted for certificates asserting a wildcard name

Details

Permitted subtree name constraints for DNS names were accepted for certificates asserting a wildcard name.

This was incorrect because, given a name constraint of accept.example.com, *.example.com could feasibly allow a name of reject.example.com which is outside the constraint. This is very similar to CVE-2025-61727.

Since name constraints are restrictions on otherwise properly-issued certificates, this bug is reachable only after signature verification and requires misissuance to exploit.

This vulnerability is identified as GHSA-xgp8-3hg3-c2mh. Thank you to @1seal for the report.

Database specific

{
    "license": "CC0-1.0"
}

References

Affected packages

crates.io / rustls-webpki

Package

Name: rustls-webpki; View open source insights on deps.dev
Purl: pkg:cargo/rustls-webpki

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-0

Fixed

0.103.12

Introduced

0.104.0-alpha.1

Fixed

0.104.0-alpha.6

Ecosystem specific

{
    "affects": {
        "functions": [],
        "arch": [],
        "os": []
    },
    "affected_functions": null
}

Database specific

informational

null