CVE-2026-55524 PraisonAI: SSRF in web_crawl tool via redirect-following and DNS rebinding (validate-then-fetch gap)
Attackers can bypass SSRF protections in PraisonAI's web_crawl tool to access internal network resources or cloud metadata via redirects or DNS rebinding.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-55524?
CVE-2026-55524 is a high-severity server-side request forgery vulnerability in MervinPraison PraisonAI, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
PraisonAI is a multi-agent teams system. In versions prior to 1.6.58, the web_crawl tool performs its SSRF check only on the initially supplied URL, allowing the protection to be bypassed so the tool connects to attacker-chosen internal destinations. The check resolves the hostname once with socket.gethostbyname and rejects private/loopback/link-local results, but then passes the URL to a fetcher using httpx.Client(follow_redirects=True) (or urllib.request.urlopen when httpx is absent, which also follows redirects) that re-resolves the hostname at connect time with no further validation. This validate-here/fetch-there gap is exploitable through both HTTP redirects and DNS rebinding. If an attacker can influence URLs passed to web_crawl(), directly or through an agent/tool workflow, they can cause the PraisonAI host to fetch loopback, private-network, or cloud metadata endpoints reachable from that host, with the response body returned in the web_crawl() result. This issue has been fixed in version 1.6.58.
Which versions are affected by CVE-2026-55524?
3 open source packages ship an affected version, including praisonaiagents.
| Package | Affected | Fixed in |
|---|---|---|
praisonaiagents PyPI | All versions | 1.6.58 |
praisonaiagents PyPI | All versions | 1.6.58 |
praisonaiagents PyPI | All versions | 1.6.58 |
How do I fix CVE-2026-55524?
Upgrade praisonaiagents to 1.6.58 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-55524 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55524 exists.
Sources
Also known as GHSA-vg6p-v9vm-6fgj, PYSEC-2026-3904.