# CVE-2026-44742: postorius: Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, a...

CVE-2026-44742 is fixed in 4 products on 1 platform, first by python-django-postorius 1.1.2-3ubuntu0.1+esm1, released May 7, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-44742
- Priority: Routine
- CVSS: 6.1 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 7, 2026

## Description

Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | postorius Debian 12.15 (bookworm) | 1.3.8-3+deb12u1 | [DEBIAN-CVE-2026-44742](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44742.md) | May 15, 2026 |
| Linux | postorius Debian 13.5 (trixie) | 1.3.13-1+deb13u1 | [DEBIAN-CVE-2026-44742](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44742.md) | May 15, 2026 |
| Linux | postorius Fedora 43 | 1.3.13-1.fc43 | [FEDORA-2026-C2B475C5F1](https://patchblox.com/security/data/fix/linux/fedora-2026-c2b475c5f1.md) | Jun 17, 2026 |
| Linux | python-django-postorius Ubuntu 18.04.6 LTS (bionic) | 1.1.2-3ubuntu0.1+esm1 | [python-django-postorius 1.1.2-3ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-django-postorius-1.1.2-3ubuntu0.1-esm1.md) | May 7, 2026 |
| Linux | python-postorius Fedora 43 | 1.3.13-1.fc43 | [FEDORA-2026-C2B475C5F1](https://patchblox.com/security/data/fix/linux/fedora-2026-c2b475c5f1.md) | Jun 17, 2026 |
| Linux | python3-django-postorius Ubuntu 20.04 LTS (focal) | 1.2.4-1ubuntu0.1+esm1 | [python3-django-postorius 1.2.4-1ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-django-postorius-1.2.4-1ubuntu0.1-esm1.md) | May 7, 2026 |
| Linux | python3-django-postorius Ubuntu 22.04.1 LTS (jammy) | 1.3.5-1ubuntu0.1~esm1 | [python3-django-postorius 1.3.5-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-django-postorius-1.3.5-1ubuntu0.1-esm1.md) | May 7, 2026 |
| Linux | python3-django-postorius Ubuntu 24.04.5 LTS (noble) | 1.3.10-1ubuntu0.1~esm1 | [python3-django-postorius 1.3.10-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-django-postorius-1.3.10-1ubuntu0.1-esm1.md) | May 7, 2026 |
| Linux | python3-django-postorius Ubuntu 25.10 (questing) | 1.3.13-1ubuntu1.1~25.10.1 | [python3-django-postorius 1.3.13-1ubuntu1.1~25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-python3-django-postorius-1.3.13-1ubuntu1.1-25.10.1.md) | May 7, 2026 |
| Linux | python3-django-postorius Ubuntu 26.04.1 LTS (resolute) | 1.3.13-1ubuntu1.1~26.04.1 | [python3-django-postorius 1.3.13-1ubuntu1.1~26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-django-postorius-1.3.13-1ubuntu1.1-26.04.1.md) | May 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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