Improper Certificate Validation Affecting rustup package, versions <1.29.1~0-160000.1.1


Severity

Recommended
high

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.18% (8th percentile)

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  • Snyk IDSNYK-SLES1600-RUSTUP-20570857
  • published8 Oct 2026
  • disclosed2 Oct 2026

Introduced: 2 Oct 2026

NewCVE-2026-93600  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 rustup to version 1.29.1~0-160000.1.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rustup package and not the rustup package as distributed by SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1