praisonaiagents vulnerable to SSRF in web_crawl tool via redirect-following and DNS rebinding (validate-then-fetch gap)

Exploitation

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

CVSS

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

EPSS

• CVE-2026-55524: 0.24% estimated exploitation activity in the next 30 days; percentile 15.43 (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.

The webcrawl tool performs its SSRF check only on the initial URL: it resolves the hostname once with socket.gethostbyname and rejects private/loopback/link-local results. It then passes the URL to a fetcher that uses httpx.Client(followredirects=True) - or urllib.request.urlopen when httpx is absent, which also follows redirects - and re-resolves the hostname at connect time, with no further validation. This validate-here/fetch-there gap is bypassable two independent ways: HTTP redirects and DNS rebinding. Affected code: src/praisonai-agents/praisonaiagents/tools/webcrawltools.py - Single-shot validation (lines 229-238): if os.environ.get("ALLOWLOCALCRAWL") != "true": ipstr = socket.gethostbyname(hostname)

resolved ONCE, at validation time ip = ipaddress.ipaddress(ipstr) if ip.isloopback or ip.isprivate or ip.islinklocal or ip.ismulticast or ip.isunspecified: continue

rejected urllist.append(u) - Vulnerable fetch (crawlwithhttpx, lines 142 / 149): follows redirects, re-resolves…

Published by the source

25 Aug 2026, 14:43 UTC

Last modified by the source

25 Aug 2026, 14:43 UTC

Source last checked

26 Oct 2026, 13:50 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-vg6p-v9vm-6fgj

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# Patch Next advisory brief: CVE-2026-55524

Advisory: praisonaiagents vulnerable to SSRF in web_crawl tool via redirect-following and DNS rebinding (validate-then-fetch gap)
IDs: CVE-2026-55524, GHSA-vg6p-v9vm-6fgj
Record: https://patchnext.com/advisories/cve-2026-55524 (revision 1, source checked 26 Oct 2026, 13:50 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: praisonaiagents 1.6.58. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI praisonaiagents: affected < 1.6.58; fixed in 1.6.58

## Suggested inspection (read-only)
- `python -m pip show praisonaiagents`: 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.
- 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://github.com/advisories/GHSA-vg6p-v9vm-6fgj (GitHub-reviewed advisory GHSA-vg6p-v9vm-6fgj lists affected ranges: PyPI praisonaiagents >=0 <1.6.58)

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