CVE-2026-42865: Inbox Zero: Cross-account cleaner email stream exposure

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-11 · updated 2026-10-26
Weakness: CWE-200

Description

Inbox Zero is an AI personal assistant for email. Prior to 2.29.3, the cleaner email stream endpoint used a shared Redis subscription listener, which could deliver thread events for one authenticated account to another authenticated account using the cleaner feature at the same time. This vulnerability is fixed in 2.29.3.

Affected products

elie222 inbox-zero: before 2.29.3 — fixed in 2.29.3

How to fix

Upgrade to a fixed version: elie222 inbox-zero 2.29.3. Check the vendor advisory for mitigations.

References

https://github.com/elie222/inbox-zero/commit/02341923b5460ce9630c4681a9b6461ba466688a
https://github.com/elie222/inbox-zero/security/advisories/GHSA-f3gp-v7cj-2569

Get alerted when CVE-2026-42865 or the next vulnerability affects your stack