CVE-2026-18647 jina-ai reader Crawler/Puppeteer crawler.ts isValidTLD server-side request forgery
An attacker can exploit a flaw in the Crawler component to perform server-side request forgery, potentially accessing internal resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18647?
CVE-2026-18647 is a medium-severity server-side request forgery vulnerability in jina-ai reader, published on 3 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security vulnerability has been detected in jina-ai reader up to 1574bfd380d249c86c82db4dace0d9c8fe17e2b1. This issue affects the function isValidTLD of the file /backend/functions/src/cloud-functions/crawler.ts of the component Crawler/Puppeteer. The manipulation leads to server-side request forgery. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. This product follows a rolling release approach for continuous delivery, so version details for affected or updated releases are not provided. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-918
Which versions are affected by CVE-2026-18647?
How do I fix CVE-2026-18647?
No fix has been published for CVE-2026-18647 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-2026-18647 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18647 exists.
Sources
Also known as GHSA-4xp8-858j-g46w.