PraisonAI: Unauthenticated Event Injection via SSE /publish Endpoint

Exploitation

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

CVSS

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

EPSS

• CVE-2026-57128: 0.25% estimated exploitation activity in the next 30 days; percentile 16.82 (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 The SSE (Server-Sent Events) server in src/praisonai-agents/praisonaiagents/server/server.py exposes a /publish endpoint that broadcasts arbitrary messages to all connected clients without any authentication. The ServerConfig dataclass (line 24) defines an authtoken field, but this token is never validated in the /publish or /events request handlers. Any attacker with access to the SSE server port can inject arbitrary events into the SSE stream visible to all connected clients, or use /info to leak server configuration including connected client count. Details Vulnerable code (lines 164–180): The authtoken field in ServerConfig (line 31): This authtoken is never referenced in any request handler. The /publish endpoint processes any POST request regardless of authentication headers. The /info endpoint (line 182) also has no auth and returns server configuration including self.config.todict(). Routes registration (lines 190–194): No authentication middleware or token validation…

Published by the source

18 Jun 2026, 13:52 UTC

Last modified by the source

23 Jul 2026, 15:11 UTC

Source last checked

26 Oct 2026, 13:49 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-35w5-pcw4-jx94

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-35w5-pcw4-jx94

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# Patch Next advisory brief: CVE-2026-57128

Advisory: PraisonAI: Unauthenticated Event Injection via SSE `/publish` Endpoint
IDs: CVE-2026-57128, GHSA-35w5-pcw4-jx94
Record: https://patchnext.com/advisories/cve-2026-57128 (revision 2, source checked 26 Oct 2026, 13:49 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 4.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: praisonaiagents 1.6.59. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI praisonaiagents: affected <= 1.6.48; fixed in 1.6.59

## 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://osv.dev/vulnerability/GHSA-35w5-pcw4-jx94 (OSV record GHSA-35w5-pcw4-jx94 lists affected ranges: PyPI praisonaiagents >=0 <1.6.59 (fixed))
- Verified: https://github.com/advisories/GHSA-35w5-pcw4-jx94 (GitHub-reviewed advisory GHSA-35w5-pcw4-jx94 lists affected ranges: PyPI praisonaiagents >=0 <=1.6.48)

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