CVE-2026-48911 Apache Answer: Unauthenticated OAuth Email-Binding Account Takeover via Existing User Confirmation Flow

What is CVE-2026-48911?

CVE-2026-48911 is a high-severity missing authorization vulnerability in Apache Answer, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-306

Which versions are affected by CVE-2026-48911?

It affects 1 product.

Products include Apache Answer.

How do I fix CVE-2026-48911?

No fix has been published for CVE-2026-48911 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-48911 being exploited?

There is no known exploitation of CVE-2026-48911 in the wild and no public exploit code.

Other vulnerabilities in Apache Answer

• CVE-2026-60053 Apache Answer: Residual Administrative API Key Access After Role or Account Revocation Critical 9.1
• CVE-2024-22393 Apache Answer: Pixel Flood Attack by uploading the large pixel file Critical 9.1
• CVE-2026-48834 Apache Answer: Denial of service via crafted Accept-Language header parsing High 7.5
• CVE-2026-60023 Apache Answer: Unauthorized disclosure of deleted or pending answer content High 7.5
• CVE-2026-24735 Apache Answer: Revision API Improper Access Control leads to Information Disclosure High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-47mw-vx77-gwvj.