CVE-2026-44742
High
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.
SeverityHigh
CVSS7.2
Exploit probability—
ProductPostorius
PublishedMay 7, 2026
First seenMay 7, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| postorius_project postorius | v ≤ 1.3.13 | — |
| postoriusPyPI | v ≤ 1.3.13 | — |
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