CVE-2026-76168 Apache James: ManageSieve file implementation cross-user path traversal

CriticalCVSS 9.8

Published: 2026-11-06 13:44
Updated: 2026-11-10 20:41
Exploit status: No public exploit known

Description

In Apache James server prior version 3.9.1 relying on the SieveFileRepository incorect validation of file paths can result in path transversal, allowing to set arbitrary SIEVE scripts for other users.
This allows a logged in attacker to set arbitrary SIEVE scripts for other users, resulting in denial of service or even traffic capture.
Users are recommended to upgrade to version 3.9.1 which fixes this issue.

Affected products

Product	Affected versions	Fixed in
Apache James	< 3.9.1	3.9.1

References

lists.apache.org vendor-advisory
www.openwall.com

CVSS v3.1

9.8 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Weakness & likelihood

EPSS (exploitation probability, 30 days): Not available
CWE: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Public exploit references

Metadata only. CVERadar never hosts or runs exploit code.

No public exploit references known.