CVE-2026-15525 kLOsk adloop write.py _validate_urls server-side request forgery
Remote attackers can exploit a server-side request forgery vulnerability in the adloop library's URL validation function to access internal resources.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15525?
CVE-2026-15525 is a medium-severity server-side request forgery vulnerability in kLOsk adloop, published on 13 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was detected in kLOsk adloop up to 0.9.0. This vulnerability affects the function _validate_urls of the file src/adloop/ads/write.py. Performing a manipulation of the argument final_url results in server-side request forgery. The attack may be initiated remotely. The exploit is now public and may be used. Upgrading to version 0.10.0 is able to resolve this issue. The patch is named 217399723e3a2fb39389e5355d49ed80aaf9ea7c. Upgrading the affected component is advised.
Weakness: CWE-918
Which versions are affected by CVE-2026-15525?
How do I fix CVE-2026-15525?
No fix has been published for CVE-2026-15525 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-15525 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15525 exists.
Sources
Also known as GHSA-cvvx-wcx7-g65m.