CVE-2026-44742
Publication date 7 May 2026
Last updated 27 May 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| postorius | 26.04 LTS resolute |
Fixed 1.3.13-1ubuntu1.1~26.04.1
|
| 25.10 questing |
Fixed 1.3.13-1ubuntu1.1~25.10.1
|
|
| 24.04 LTS noble |
Fixed 1.3.10-1ubuntu0.1~esm1
|
|
| 22.04 LTS jammy |
Fixed 1.3.5-1ubuntu0.1~esm1
|
|
| 20.04 LTS focal |
Fixed 1.2.4-1ubuntu0.1+esm1
|
|
| 18.04 LTS bionic |
Fixed 1.1.2-3ubuntu0.1+esm1
|
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| Parameter | Value |
|---|---|
| Base score |
7.2 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Changed |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-8323-1
- Postorius vulnerability
- 27 May 2026