What is CVE-2026-34031?

CVE-2026-34031 is a medium-severity vulnerability in Apache Answer, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.5/10. Published 2026-06-09.

How severe is CVE-2026-34031?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Arbitrary file upload in Apache Answer

CVE-2026-34031

Unrestricted Upload of File with Dangerous Type vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. The server did not sufficiently validate user-supplied image URLs, allowing arbitrary external content to be embedded as profile images, which could expose users to unintended external requests and tracking by third-party servers. Users are recommended to upgrade to version 2.0.1, which fixes the issue.

Vulnerability class: Unrestricted File Upload

Published 2026-06-09 · last modified 2026-07-23.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (30.1th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.004 · change: -0.003

Affected products

Apache Answer
Apache Software Foundation Answer — versions 0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

lists.apache.org/thread/rwtxy39t54to9kv3dqtbjsbdpyk4jkd2 (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-34031?: CVE-2026-34031 is a medium-severity vulnerability in Apache Answer, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.5/10. Published 2026-06-09.
How severe is CVE-2026-34031?: Medium severity. CVSS v3 base score is 6.5 out of 10.