# CVE-2026-41080: expat: libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.

CVE-2026-41080 is fixed in 7 products on 1 platform, first by DEBIAN-CVE-2026-41080, released May 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-41080
- Priority: Routine
- CVSS: 2.9 (low)
- EPSS: 0.0040
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 16, 2026

## Description

libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | MozillaFirefox opensuse-leap 16.0 | 153.5.0-160000.1.1 | [OPENSUSE-SU-2026:22139-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22139-1.md) | Nov 7, 2026 |
| Linux | MozillaFirefox sles 15.6 | 153.5.0-150400.157.16.1 | [SUSE-SU-2026:4834-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4834-1.md) | Nov 7, 2026 |
| Linux | MozillaFirefox sles 15.7 | 153.5.0-150400.157.16.1 | [SUSE-SU-2026:4834-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4834-1.md) | Nov 7, 2026 |
| Linux | MozillaFirefox sles 16.0 | 153.5.0-160000.1.1 | [SUSE-SU-2026:24260-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24260-1.md) | Nov 7, 2026 |
| Linux | MozillaThunderbird sles 15.7 | 153.5.0-150400.13.9.1 | [SUSE-SU-2026:4736-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4736-1.md) | Nov 7, 2026 |
| Linux | expat Debian 13.5 (trixie) | 2.8.2-1~deb13u1 | [DEBIAN-CVE-2026-41080](https://patchblox.com/security/data/fix/linux/debian-cve-2026-41080.md) | May 15, 2026 |
| Linux | expat Debian 14 | 2.8.0-1 | [DEBIAN-CVE-2026-41080](https://patchblox.com/security/data/fix/linux/debian-cve-2026-41080.md) | May 15, 2026 |
| Linux | expat Ubuntu 24.04.5 LTS (noble) | 2.6.1-2ubuntu0.5 | [expat 2.6.1-2ubuntu0.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-expat-2.6.1-2ubuntu0.5.md) | Jun 21, 2026 |
| Linux | expat Ubuntu 26.04.1 LTS (resolute) | 2.7.4-1ubuntu0.1 | [expat 2.7.4-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-expat-2.7.4-1ubuntu0.1.md) | Jun 21, 2026 |
| Linux | expat opensuse-leap 16.0 | 2.8.4-160000.1.1 | [OPENSUSE-SU-2026:21945-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21945-1.md) | Sep 24, 2026 |
| Linux | expat sles 15.6 | 2.8.5-150400.3.40.1 | [SUSE-SU-2026:4623-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4623-1.md) | Nov 7, 2026 |
| Linux | expat sles 15.7 | 2.8.5-150700.3.15.1 | [SUSE-SU-2026:4619-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4619-1.md) | Nov 7, 2026 |
| Linux | expat sles 16.0 | 2.8.4-160000.1.1 | [SUSE-SU-2026:23912-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23912-1.md) | Sep 24, 2026 |
| Linux | firefox amzn 2023 | 140.10.1-1.amzn2023.0.2 | [ALAS2023-2026-1706](https://patchblox.com/security/data/fix/linux/alas2023-2026-1706.md) | May 25, 2026 |
| Linux | firefox-debuginfo amzn 2023 | 140.10.1-1.amzn2023.0.2 | [ALAS2023-2026-1706](https://patchblox.com/security/data/fix/linux/alas2023-2026-1706.md) | May 25, 2026 |
| Linux | firefox-debugsource amzn 2023 | 140.10.1-1.amzn2023.0.2 | [ALAS2023-2026-1706](https://patchblox.com/security/data/fix/linux/alas2023-2026-1706.md) | May 25, 2026 |
| Linux | libexpat1 Ubuntu 24.04.5 LTS (noble) | 2.6.1-2ubuntu0.5 | [libexpat1 2.6.1-2ubuntu0.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libexpat1-2.6.1-2ubuntu0.5.md) | Jun 21, 2026 |
| Linux | libexpat1 Ubuntu 26.04.1 LTS (resolute) | 2.7.4-1ubuntu0.1 | [libexpat1 2.7.4-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libexpat1-2.7.4-1ubuntu0.1.md) | Jun 21, 2026 |

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Data as of 2026-11-09T07:25:28Z 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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