# CVE-2026-53586: libgit2: libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allow... CVE-2026-53586 is fixed in 30 products on 1 platform, first by libgit2-1.9 1.9.1+ds-1ubuntu1.1, released July 30, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-53586 - Priority: Routine - CVSS: 6.5 (medium) - EPSS: 0.0028 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jul 30, 2026 ## Description libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, the built-in HTTP transport in src/libgit2/transports/http.c follows an offsite initial redirect, and handle_remote_auth and handle_auth pass transport->owner->url instead of transport->server.url to the credential callback when the redirected host returns 401 Unauthorized. A callback that scopes credentials to the original trusted URL can therefore return GIT_CREDENTIAL_USERPASS_PLAINTEXT credentials that libgit2 stores in transport->server.cred and sends as an Authorization header to the redirected host. An attacker who controls a trusted Git host or an open redirect on that host can disclose HTTP Basic credentials, personal access tokens, or equivalent credentials. This issue is fixed in versions 1.8.6 and 1.9.5. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | cargo amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | cargo-debuginfo amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | clippy amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | clippy-debuginfo amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | libgit2 Debian 12.15 (bookworm) | 1.5.1+ds-1+deb12u2 | [DEBIAN-CVE-2026-53586](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53586.md) | Jul 31, 2026 | | Linux | libgit2 Debian 13.5 (trixie) | 1.9.0+ds-2+deb13u1 | [DEBIAN-CVE-2026-53586](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53586.md) | Jul 31, 2026 | | Linux | libgit2 Debian 14 | 1.9.6+ds-1 | [DEBIAN-CVE-2026-53586](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53586.md) | Jul 31, 2026 | | Linux | libgit2 amzn 2023 | 1.6.4-116.amzn2023 | [ALAS2023-2026-2083](https://patchblox.com/security/data/fix/linux/alas2023-2026-2083.md) | Aug 31, 2026 | | Linux | libgit2-1.1 Ubuntu 22.04.1 LTS (jammy) | 1.1.0+dfsg.1-4.1ubuntu0.1+esm1 | [libgit2-1.1 1.1.0+dfsg.1-4.1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libgit2-1.1-1.1.0-dfsg.1-4.1ubuntu0.1-esm1.md) | Aug 14, 2026 | | Linux | libgit2-1.7 Ubuntu 24.04.5 LTS (noble) | 1.7.2+ds-1ubuntu3.1 | [libgit2-1.7 1.7.2+ds-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libgit2-1.7-1.7.2-ds-1ubuntu3.1.md) | Aug 14, 2026 | | Linux | libgit2-1.9 Ubuntu 26.04.1 LTS (resolute) | 1.9.1+ds-1ubuntu1.1 | [libgit2-1.9 1.9.1+ds-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libgit2-1.9-1.9.1-ds-1ubuntu1.1.md) | Jul 30, 2026 | | Linux | libgit2-28 Ubuntu 20.04 LTS (focal) | 0.28.4+dfsg.1-2ubuntu0.1+esm1 | [libgit2-28 0.28.4+dfsg.1-2ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libgit2-28-0.28.4-dfsg.1-2ubuntu0.1-esm1.md) | Aug 14, 2026 | | Linux | libgit2-debuginfo amzn 2023 | 1.6.4-116.amzn2023 | [ALAS2023-2026-2083](https://patchblox.com/security/data/fix/linux/alas2023-2026-2083.md) | Aug 31, 2026 | | Linux | libgit2-debugsource amzn 2023 | 1.6.4-116.amzn2023 | [ALAS2023-2026-2083](https://patchblox.com/security/data/fix/linux/alas2023-2026-2083.md) | Aug 31, 2026 | | Linux | libgit2-devel amzn 2023 | 1.6.4-116.amzn2023 | [ALAS2023-2026-2083](https://patchblox.com/security/data/fix/linux/alas2023-2026-2083.md) | Aug 31, 2026 | | Linux | libgit2-fixtures Ubuntu 22.04.1 LTS (jammy) | 1.1.0+dfsg.1-4.1ubuntu0.1+esm1 | [libgit2-fixtures 1.1.0+dfsg.1-4.1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libgit2-fixtures-1.1.0-dfsg.1-4.1ubuntu0.1-esm1.md) | Aug 14, 2026 | | Linux | libgit2-fixtures Ubuntu 24.04.5 LTS (noble) | 1.7.2+ds-1ubuntu3.1 | [libgit2-fixtures 1.7.2+ds-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libgit2-fixtures-1.7.2-ds-1ubuntu3.1.md) | Aug 14, 2026 | | Linux | libgit2-fixtures Ubuntu 26.04.1 LTS (resolute) | 1.9.1+ds-1ubuntu1.1 | [libgit2-fixtures 1.9.1+ds-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libgit2-fixtures-1.9.1-ds-1ubuntu1.1.md) | Jul 30, 2026 | | Linux | rust amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-analyzer amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-analyzer-debuginfo amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-debugger-common amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-debuginfo amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-debugsource amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-doc amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-gdb amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-lldb amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-src amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-std-static amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-std-static-wasm32-unknown-unknown amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-std-static-wasm32-wasip1 amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-toolset amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rust-toolset-srpm-macros amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rustfmt amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | | Linux | rustfmt-debuginfo amzn 2023 | 1.97.0-2.amzn2023 | [ALAS2023-2026-2065](https://patchblox.com/security/data/fix/linux/alas2023-2026-2065.md) | Aug 17, 2026 | --- Data as of 2026-11-08T06:59:42Z UTC. 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