CVE-2026-34031 Apache Answer: The custom avatar was not properly validated
Attackers can embed arbitrary external content as profile images, exposing users to tracking and unintended external requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-34031?
CVE-2026-34031 is a medium-severity vulnerability in Apache Answer, published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-434
Which versions are affected by CVE-2026-34031?
3 open source packages ship an affected version, including github.com/apache/incubator-answer and github.com/apache/answer. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/apache/incubator-answer Go | All versions | 1.7.2-0.20260511040518-11091244f64e |
github.com/apache/incubator-answer Go | All versions | 1.7.2-0.20260511040518-11091244f64e |
github.com/apache/answer Go | All versions | 1.7.2-0.20260511040518-11091244f64e |
Products include Apache Answer.
How do I fix CVE-2026-34031?
Upgrade github.com/apache/incubator-answer to 1.7.2-0.20260511040518-11091244f64e or later.
Is CVE-2026-34031 being exploited?
There is no known exploitation of CVE-2026-34031 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
- CVE-2024-22393 Apache Answer: Pixel Flood Attack by uploading the large pixel file
- CVE-2026-48834 Apache Answer: Denial of service via crafted Accept-Language header parsing
- CVE-2026-48911 Apache Answer: Unauthenticated OAuth Email-Binding Account Takeover via Existing User Confirmation Flow
- CVE-2026-60023 Apache Answer: Unauthorized disclosure of deleted or pending answer content
Sources
Also known as GHSA-x4f6-mqg6-28xx, GO-2026-6154.