# CVE-2026-93602: rustls-webpki before 0.103.10 CRL Revocation Check Bypass

CVE-2026-93602 is fixed in 7 products on 1 platform, first by DEBIAN-CVE-2026-93602, released September 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-93602
- Priority: Routine
- CVSS: 4.4 (Moderate)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 18, 2026
- Weakness: Improper Check for Certificate Revocation
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-93602

## Description

rustls-webpki versions before 0.103.10 and 0.104.0-alpha.5 contain faulty CRL authority-matching logic that compares only the first distributionPoint against each CRL's IssuingDistributionPoint, ignoring additional distributionPoints. Attackers with a compromised trusted issuing authority can present revoked certificates that pass revocation checks under UnknownStatusPolicy::Allow, or cause incorrect errors under the default deny policy.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | aws-nitro-enclaves-cli opensuse-leap 16.0 | 1.5.2~git0.1c496ed-160000.1.1 | [OPENSUSE-SU-2026:22175-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22175-1.md) | Nov 7, 2026 |
| Linux | aws-nitro-enclaves-cli sles 15.6 | 1.5.2~git0.1c496ed-150600.10.18.1 | [SUSE-SU-2026:5066-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5066-1.md) | Nov 7, 2026 |
| Linux | aws-nitro-enclaves-cli sles 15.7 | 1.5.2~git0.1c496ed-150600.10.18.1 | [SUSE-SU-2026:5066-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5066-1.md) | Nov 7, 2026 |
| Linux | aws-nitro-enclaves-cli sles 16.0 | 1.5.2~git0.1c496ed-160000.1.1 | [SUSE-SU-2026:24467-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24467-1.md) | Nov 7, 2026 |
| Linux | rust-rustls-webpki Debian 14 | 0.103.10+ds-1 | [DEBIAN-CVE-2026-93602](https://patchblox.com/security/data/fix/linux/debian-cve-2026-93602.md) | Sep 19, 2026 |
| Linux | rustup opensuse-leap 16.0 | 1.29.1~0-160000.1.1 | [OPENSUSE-SU-2026:22016-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22016-1.md) | Oct 2, 2026 |
| Linux | rustup sles 16.0 | 1.29.1~0-160000.1.1 | [SUSE-SU-2026:24014-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24014-1.md) | Oct 2, 2026 |
| Linux | sccache opensuse-leap 16.0 | 0.18.0~2-160000.1.1 | [OPENSUSE-SU-2026:21982-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21982-1.md) | Sep 30, 2026 |
| Linux | sccache sles 16.0 | 0.18.0~2-160000.1.1 | [SUSE-SU-2026:23983-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23983-1.md) | Sep 30, 2026 |
| Linux | sequoia-sq opensuse-leap 16.0 | 1.5.0-bp160.1.1 | [OPENSUSE-RU-2026:22132-1](https://patchblox.com/security/data/fix/linux/opensuse-ru-2026-22132-1.md) | Nov 7, 2026 |
| Linux | shadowsocks-libev opensuse-leap 16.0 | 3.3.6-bp160.3.1 | [OPENSUSE-SU-2026:22189-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22189-1.md) | Nov 7, 2026 |
| Linux | shadowsocks-rust opensuse-leap 16.0 | 1.25.0-bp160.1.1 | [OPENSUSE-SU-2026:22189-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22189-1.md) | Nov 7, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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