# CVE-2025-13034: No QUIC certificate pinning with GnuTLS

CVE-2025-13034 is fixed in 12 products on 1 platform, first by DEBIAN-CVE-2025-13034, released January 8, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-13034
- Priority: Routine
- CVSS: 5.9 (Moderate)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 5, 2026
- Weakness: Improper Certificate Validation
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-13034

## Description

When using `CURLOPT_PINNEDPUBLICKEY` option with libcurl or `--pinnedpubkey` with the curl tool, curl should check the public key of the server certificate to verify the peer.  This check was skipped in a certain condition that would then make curl allow the connection without performing the proper check, thus not noticing a possible impostor. To skip this check, the connection had to be done with QUIC with ngtcp2 built to use GnuTLS and the user had to explicitly disable the standard certificate verification.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | curl Debian 13.5 (trixie) | 8.14.1-2+deb13u3 | [DEBIAN-CVE-2025-13034](https://patchblox.com/security/data/fix/linux/debian-cve-2025-13034.md) | Jan 8, 2026 |
| Linux | curl Debian 14 | 8.18.0~rc2-1 | [DEBIAN-CVE-2025-13034](https://patchblox.com/security/data/fix/linux/debian-cve-2025-13034.md) | Jan 8, 2026 |
| Linux | curl Ubuntu 25.10 (questing) | 8.14.1-2ubuntu1.1 | [curl 8.14.1-2ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-curl-8.14.1-2ubuntu1.1.md) | Mar 12, 2026 |
| Linux | curl amzn 2023 | 8.17.0-1.amzn2023.0.1 | [ALAS2023-2026-1375](https://patchblox.com/security/data/fix/linux/alas2023-2026-1375.md) | Feb 16, 2026 |
| Linux | curl-debuginfo amzn 2023 | 8.17.0-1.amzn2023.0.1 | [ALAS2023-2026-1375](https://patchblox.com/security/data/fix/linux/alas2023-2026-1375.md) | Feb 16, 2026 |
| Linux | curl-debugsource amzn 2023 | 8.17.0-1.amzn2023.0.1 | [ALAS2023-2026-1375](https://patchblox.com/security/data/fix/linux/alas2023-2026-1375.md) | Feb 16, 2026 |
| Linux | curl-minimal amzn 2023 | 8.17.0-1.amzn2023.0.1 | [ALAS2023-2026-1375](https://patchblox.com/security/data/fix/linux/alas2023-2026-1375.md) | Feb 16, 2026 |
| Linux | curl-minimal-debuginfo amzn 2023 | 8.17.0-1.amzn2023.0.1 | [ALAS2023-2026-1375](https://patchblox.com/security/data/fix/linux/alas2023-2026-1375.md) | Feb 16, 2026 |
| Linux | libcurl amzn 2023 | 8.17.0-1.amzn2023.0.1 | [ALAS2023-2026-1375](https://patchblox.com/security/data/fix/linux/alas2023-2026-1375.md) | Feb 16, 2026 |
| Linux | libcurl-debuginfo amzn 2023 | 8.17.0-1.amzn2023.0.1 | [ALAS2023-2026-1375](https://patchblox.com/security/data/fix/linux/alas2023-2026-1375.md) | Feb 16, 2026 |
| Linux | libcurl-devel amzn 2023 | 8.17.0-1.amzn2023.0.1 | [ALAS2023-2026-1375](https://patchblox.com/security/data/fix/linux/alas2023-2026-1375.md) | Feb 16, 2026 |
| Linux | libcurl-minimal amzn 2023 | 8.17.0-1.amzn2023.0.1 | [ALAS2023-2026-1375](https://patchblox.com/security/data/fix/linux/alas2023-2026-1375.md) | Feb 16, 2026 |
| Linux | libcurl-minimal-debuginfo amzn 2023 | 8.17.0-1.amzn2023.0.1 | [ALAS2023-2026-1375](https://patchblox.com/security/data/fix/linux/alas2023-2026-1375.md) | Feb 16, 2026 |
| Linux | libcurl3t64-gnutls Ubuntu 25.10 (questing) | 8.14.1-2ubuntu1.1 | [libcurl3t64-gnutls 8.14.1-2ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libcurl3t64-gnutls-8.14.1-2ubuntu1.1.md) | Mar 12, 2026 |
| Linux | libcurl4t64 Ubuntu 25.10 (questing) | 8.14.1-2ubuntu1.1 | [libcurl4t64 8.14.1-2ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libcurl4t64-8.14.1-2ubuntu1.1.md) | Mar 12, 2026 |

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Data as of 2026-11-08T19:12:23Z 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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