Rust advisories / webpki-root-certs
VulnerabilityRUSTSEC-2026-0383 · webpki-root-certs
RUSTSEC-2026-0383: Bundled root certificates allow trust in distrusted emSign intermediates
Short answerA security vulnerability in the webpki-root-certs crate: Bundled root certificates allow trust in distrusted emSign intermediates. No severity score was published. Fixed in 0.26.11, 1.0.10: update to a fixed version.
| Crate | webpki-root-certs |
|---|---|
| Type | Vulnerability (crypto-failure) |
| Affected versions | Before 0.26.11; from 0.26.12 before 1.0.10. |
| Fixed in | 0.26.11, 1.0.10 |
| Severity | not scored |
| Published | 2026-10-19 |
| Last changed | 2026-10-21 |
| Also known as | CVE-2026-111943, GO-2026-6809, RUSTSEC-2026-0381, RUSTSEC-2026-0382 |
What to do
- See which version you have:
cargo tree -i webpki-root-certs(it also shows which of your dependencies pulls it in). - Update within your version requirement:
cargo update -p webpki-root-certs. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for examplewebpki-root-certs = "1.0.10") or update the dependency that pulls it in. - Check again with
cargo audit, or paste your Cargo.lock into our Cargo.toml checker.
Details from the advisory
Affected versions include emSign ECC Root CA - G3, which can allow certificate paths through distrusted emSign intermediates.
Affected versions may accept certificate paths containing distrusted emSign intermediate public keys. The private keys corresponding to these intermediates are now well known.
Version 1.0.10+ removes this root.
Version 0.26.11 is a compatibility wrapper that re-exports parent::TLS_SERVER_ROOT_CERTS from its webpki-root-certs 1.x dependency; it contains no separate root certificate list. Its resolved 1.x dependency must be updated to 1.0.10 or later.
References
- Package: crates.io/crates/webpki-root-certs
- Advisory: rustsec.org/advisories/RUSTSEC-2026-0383.html
- Web: github.com/rustls/webpki-roots/pull/133
- Web: emudhra.we-have-a-problem.com/
- Web: bugzilla.mozilla.org/show_bug.cgi?id=2083449
From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.
Up next
Same cratewebpki-root-certs: security historyEvery advisory for this crate, and whether it is safe to use today.Read it next →Did this answer your question?