PraisonAI spider_tools SSRF protection bypass via alternate loopback host encodings

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.5 · CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

EPSS

• CVE-2026-47390: 0.18% estimated exploitation activity in the next 30 days; percentile 6.97 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary PraisonAI's spidertools URL validation can be bypassed using alternate loopback host encodings. The affected component is: 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, URLs such as the following bypass the protection and still reach loopback services: After the weak validation passes, scrapepage() calls requests.Session.get() on the attacker-controlled URL. This allows an attacker who can influence URLs passed to scrapepage, crawl, or extracttext to induce SSRF requests against loopback-only services. This is a server-side request forgery protection bypass. Details The affected code is in: The vulnerable flow is: The validation appears to…

Published by the source

29 May 2026, 22:27 UTC

Last modified by the source

13 Jul 2026, 16:43 UTC

Source last checked

26 Oct 2026, 13:41 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-5c6w-wwfq-7qqm

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-5c6w-wwfq-7qqm

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-47390

Advisory: PraisonAI spider_tools SSRF protection bypass via alternate loopback host encodings
IDs: CVE-2026-47390, GHSA-5c6w-wwfq-7qqm
Record: https://patchnext.com/advisories/cve-2026-47390 (revision 2, source checked 26 Oct 2026, 13:41 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: praisonaiagents 1.6.40; praisonai 4.6.40. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI praisonaiagents: affected <= 1.6.39; fixed in 1.6.40
- PyPI praisonai: affected <= 4.6.39; fixed in 4.6.40

## Suggested inspection (read-only)
- `python -m pip show praisonaiagents`: prints the installed version. Run with the environment that serves production active.
- `python -m pip show praisonai`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on praisonaiagents, praisonai.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-5c6w-wwfq-7qqm (OSV record GHSA-5c6w-wwfq-7qqm lists affected ranges: PyPI praisonaiagents >=0 =0 <4.6.40 (fixed))
- Verified: https://github.com/advisories/GHSA-5c6w-wwfq-7qqm (GitHub-reviewed advisory GHSA-5c6w-wwfq-7qqm lists affected ranges: PyPI praisonaiagents >=0 =0 <=4.6.39)

Commands are suggestions: review each one before running it.