Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| rustls | webpki | 0.101.0 – < 0.103.12, 0.104.0-alpha.1 – < 0.104.0-alpha.6 | 0.103.12 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | rust-rustls-webpki | 0.103.13+ds-1 | — |
| Debian 13 | rust-rustls-webpki | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | rust-rustls-webpki | No fix yet | — |
| Ubuntu 24.04 LTS | rust-rustls-webpki | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | aws-nitro-enclaves-cli | 1.5.2~git0.1c496ed-150600.10.18.1 | SUSE-SU-2026:5066-1 |
| SLES 15 SP6 | aws-nitro-enclaves-cli | 1.5.2~git0.1c496ed-150600.10.18.1 | SUSE-SU-2026:5066-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | aws-nitro-enclaves-cli | 1.5.2~git0.1c496ed-160000.1.1 | SUSE-SU-2026:24467-1 |
| SLES for SAP 16.0 | rustup | 1.29.1~0-160000.1.1 | SUSE-SU-2026:24014-1 |
| SLES for SAP 16.0 | sccache | 0.18.0~2-160000.1.1 | SUSE-SU-2026:23983-1 |
| SLES 16.0 | aws-nitro-enclaves-cli | 1.5.2~git0.1c496ed-160000.1.1 | SUSE-SU-2026:24467-1 |
| SLES 16.0 | rustup | 1.29.1~0-160000.1.1 | SUSE-SU-2026:24014-1 |
| SLES 16.0 | sccache | 0.18.0~2-160000.1.1 | SUSE-SU-2026:23983-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-tokenizers | 0.23.2-1.1 | openSUSE-SU-2026:11936-1 |
| openSUSE Tumbleweed | zed | 1.24.2-1.1 | openSUSE-SU-2026:12355-1 |
| openSUSE Leap 16.0 | aws-nitro-enclaves-cli | 1.5.2~git0.1c496ed-160000.1.1 | openSUSE-SU-2026:22175-1 |
| openSUSE Leap 16.0 | rustup | 1.29.1~0-160000.1.1 | openSUSE-SU-2026:22016-1 |
| openSUSE Leap 16.0 | sccache | 0.18.0~2-160000.1.1 | openSUSE-SU-2026:21982-1 |
| openSUSE Leap 16.0 | sequoia-sq | 1.5.0-bp160.1.1 | openSUSE-RU-2026:22132-1 |
| openSUSE Leap 16.0 | shadowsocks-libev | 3.3.6-bp160.3.1 | openSUSE-SU-2026:22189-1 |
| openSUSE Leap 16.0 | shadowsocks-rust | 1.25.0-bp160.1.1 | openSUSE-SU-2026:22189-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | amazon-efs-utils | 3.3.5-1.amzn2023 | ALAS2023-2026-3378 |
| Amazon Linux 2023 | aws-workload-credentials-provider | 3.1.2-1.amzn2023 | ALAS2023-2026-3375 |
| Amazon Linux 2 | amazon-efs-utils | 3.3.5-1.amzn2 | ALAS2-2026-4069 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | kata-containers-cc | 3.15.0.aks0-23 | — |
| Azure Linux 3 | rust +1 | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| crates.io | rustls-webpki | >= 0.101.0, < 0.103.12 | 0.103.12 | GHSA-965h-392x-2mh5 |
| crates.io | rustls-webpki | >= 0.104.0-alpha.1, < 0.104.0-alpha.6 | 0.104.0-alpha.6 | GHSA-965h-392x-2mh5 |
| crates.io | rustls-webpki | >= 0.0.0-0, < 0.103.12 · >= 0.104.0-alpha.1, < 0.104.0-alpha.6 | 0.103.12, 0.104.0-alpha.6 | RUSTSEC-2026-0098 |
Advisories 14
- ALAS2023-2026-3375 Important: aws-workload-credentials-provider security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Nov 9, 2026
- ALAS2023-2026-3378 Important: amazon-efs-utils security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Nov 9, 2026
- ALAS2-2026-4069 Important: amazon-efs-utils security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 9, 2026
- SUSE-SU-2026:24467-1 Security update for aws-nitro-enclaves-cli SUSE / openSUSE Security Updates · Nov 4, 2026
- SUSE-SU-2026:5066-1 Security update for aws-nitro-enclaves-cli SUSE / openSUSE Security Updates · Nov 3, 2026
- openSUSE-SU-2026:22175-1 Security update for aws-nitro-enclaves-cli SUSE / openSUSE Security Updates · Nov 1, 2026
- openSUSE-SU-2026:22189-1 Security update for shadowsocks-rust, shadowsocks-libev SUSE / openSUSE Security Updates · Nov 1, 2026
- openSUSE-SU-2026:12355-1 zed-1.24.2-1.1 on GA media SUSE / openSUSE Security Updates · Oct 31, 2026
- openSUSE-RU-2026:22132-1 Recommended update for sequoia-sq SUSE / openSUSE Security Updates · Oct 20, 2026
- SUSE-SU-2026:24014-1 Security update for rustup SUSE / openSUSE Security Updates · Oct 9, 2026
- SUSE-SU-2026:23983-1 Security update for sccache SUSE / openSUSE Security Updates · Oct 6, 2026
- openSUSE-SU-2026:22016-1 Security update for rustup SUSE / openSUSE Security Updates · Oct 3, 2026
- openSUSE-SU-2026:21982-1 Security update for sccache SUSE / openSUSE Security Updates · Oct 1, 2026
- openSUSE-SU-2026:11936-1 python313-tokenizers-0.23.2-1.1 on GA media SUSE / openSUSE Security Updates · Oct 1, 2026
References
- GitHub Security Advisory (GHSA-965h-392x-2mh5) vendor-advisory
- VulnCheck Advisory: rustls webpki Name Constraints URI Validation Bypass third-party-advisory