CVE-2026-47390 PraisonAI spider_tools SSRF protection bypass via alternate loopback host encodings
Attackers can bypass SSRF protections in PraisonAI spider tools using alternate loopback encodings to access internal services.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-47390?
CVE-2026-47390 is a medium-severity server-side request forgery vulnerability in MervinPraison PraisonAI, published on 21 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
PraisonAI is a multi-agent teams system. Prior to version 4.6.40 of PraisonAI, corresponding to version 1.6.40 of praisonaiagents, `spider_tools` URL validation can be bypassed using alternate loopback host encodings. The tool contains a URL validation function intended to block local or unsafe targets before fetching attacker-controlled URLs. However, the validation only blocks a small set of exact host strings such as `localhost` and `127.0.0.1`. It does not normalize hostnames, resolve DNS, parse numeric IPv4 variants, or validate the final resolved IP address before making the request. As a result, certain URLs may bypass the protection and still reach loopback services. After the weak validation passes, `scrape_page()` calls `requests.Session.get()` on the attacker-controlled URL. This allows an attacker who can influence URLs passed to `scrape_page`, `crawl`, or `extract_text` to induce SSRF requests against loopback-only services. This is a server-side request forgery protection bypass. PraisonAI version 4.6.40 and praisonaiagents version 1.6.40 contain a patch.
Weakness: CWE-918
Which versions are affected by CVE-2026-47390?
6 open source packages ship an affected version, including praisonaiagents, PraisonAI and praisonai.
| Package | Affected | Fixed in |
|---|---|---|
praisonaiagents PyPI | All versions | 1.6.40 |
praisonaiagents PyPI | All versions | 1.6.40 |
praisonaiagents PyPI | All versions | 1.6.40 |
PraisonAI PyPI | All versions | 4.6.40 |
praisonai PyPI | All versions | 4.6.40 |
praisonai PyPI | All versions | 4.6.40 |
How do I fix CVE-2026-47390?
Upgrade praisonaiagents to 1.6.40 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-47390 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-47390 exists.
Sources
Also known as GHSA-5c6w-wwfq-7qqm, PYSEC-2026-2902, PYSEC-2026-2941.