What is CVE-2026-48911?

CVE-2026-48911 is a high-severity vulnerability in Apache Answer, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-08-05.

How severe is CVE-2026-48911?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Apache Answer

CVE-2026-48911

Insufficient Verification of Data Authenticity vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.1. A missing authorization check in the external-login email binding flow allows unauthenticated attackers to take over arbitrary user accounts by tricking victims into clicking a crafted confirmation link. Users are recommended to upgrade to version 2.0.2, which fixes the issue.

Vulnerability class: Broken Authentication

Published 2026-08-05 · last modified 2026-10-24.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.5th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.5% 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: 0.006 · change: 0.000

Affected products

Apache Answer
Apache Software Foundation Answer — versions 0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

lists.apache.org/thread/mrlwtdnhqqgfbchjgq6rffkz67o8wyv8 (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-48911?: CVE-2026-48911 is a high-severity vulnerability in Apache Answer, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-08-05.
How severe is CVE-2026-48911?: High severity. CVSS v3 base score is 7.5 out of 10.