CVE-2026-4495 atjiu pybbs CommentApiController.java create cross site scripting
Remote attackers can inject malicious scripts via the comment creation API in pybbs, potentially leading to code execution or account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-4495?
CVE-2026-4495 is a medium-severity cross-site scripting vulnerability in atjiu pybbs, published on 20 Mar 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A security flaw has been discovered in atjiu pybbs 6.0.0. This impacts the function create of the file src/main/java/co/yiiu/pybbs/controller/api/CommentApiController.java. The manipulation results in cross site scripting. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.
Which versions are affected by CVE-2026-4495?
How do I fix CVE-2026-4495?
No fix has been published for CVE-2026-4495 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-4495 being exploited?
There is no known exploitation of CVE-2026-4495 in the wild and no public exploit code.
Sources
Also known as GHSA-7r5p-f7h5-h6gp.