PraisonAI has Unrestricted Upload Size in WSGI Recipe Registry Server that Enables Memory Exhaustion DoS

Exploitation

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

CVSS

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

EPSS

• CVE-2026-40115: 0.33% estimated exploitation activity in the next 30 days; percentile 26.78 (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 WSGI-based recipe registry server (server.py) reads the entire HTTP request body into memory based on the client-supplied Content-Length header with no upper bound. Combined with authentication being disabled by default (no token configured), any local process can send arbitrarily large POST requests to exhaust server memory and cause a denial of service. The Starlette-based server (serve.py) has RequestSizeLimitMiddleware with a 10MB limit, but the WSGI server lacks any equivalent protection. Details The vulnerable code path in src/praisonai/praisonai/recipe/server.py: 1. No size limit on body read (line 551-555): The contentlength is taken directly from the HTTP header with no maximum check. The entire body is read into a single bytes object in memory. 2. Second in-memory copy via multipart parsing (line 169-172): The parsemultipart method splits the already-buffered body and stores file contents in a dict, creating additional in-memory copies. 3. Third copy to temp…

Published by the source

10 Apr 2026, 19:23 UTC

Last modified by the source

13 Jul 2026, 16:43 UTC

Source last checked

26 Oct 2026, 13:40 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-2xgv-5cv2-47vv

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-2xgv-5cv2-47vv

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# Patch Next advisory brief: CVE-2026-40115

Advisory: PraisonAI has Unrestricted Upload Size in WSGI Recipe Registry Server that Enables Memory Exhaustion DoS
IDs: CVE-2026-40115, GHSA-2xgv-5cv2-47vv
Record: https://patchnext.com/advisories/cve-2026-40115 (revision 2, source checked 26 Oct 2026, 13:40 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.2)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: praisonai 4.5.128. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI praisonai: affected < 4.5.128; fixed in 4.5.128

## Suggested inspection (read-only)
- `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 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-2xgv-5cv2-47vv (OSV record GHSA-2xgv-5cv2-47vv lists affected ranges: PyPI praisonai >=0 <4.5.128 (fixed))
- Verified: https://github.com/advisories/GHSA-2xgv-5cv2-47vv (GitHub-reviewed advisory GHSA-2xgv-5cv2-47vv lists affected ranges: PyPI praisonai >=0 <4.5.128)

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