PraisonAI's symlink-extraction bypass of _safe_extractall writes outside dest_dir

Exploitation

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

CVSS 4.0

8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-44340: 0.43% estimated exploitation activity in the next 30 days; percentile 37.65 (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 safeextractall helper that all recipe pull, recipe publish, and recipe unpack flows route through validates each archive member's name for absolute paths, .. segments, and resolved-path escape — but does not validate member.linkname, does not reject symlink/hardlink members, and calls tar.extractall(destdir) without filter="data". A bundle that contains a symlink with a name inside destdir but a linkname pointing outside it, followed by a regular file whose path traverses through the just-created symlink, escapes destdir and lets the attacker write arbitrary content to an attacker-chosen location on the victim's filesystem. Affected paths Every code path that calls safeextractall is exposed: | Caller | File:line | |---|---| | praisonai recipe unpack | src/praisonai/praisonai/cli/features/recipe.py:1175 (introduced as the fix for GHSA-99g3-w8gr-x37c) | | LocalRegistry.unpack (recipe pull) | src/praisonai/praisonai/recipe/registry.py:413 | | Registry archive validation…

Published by the source

11 May 2026, 13:59 UTC

Last modified by the source

13 Jul 2026, 16:42 UTC

Source last checked

26 Oct 2026, 13:41 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-9q28-ghcr-c4x3

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-9q28-ghcr-c4x3

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# Patch Next advisory brief: CVE-2026-44340

Advisory: PraisonAI's symlink-extraction bypass of `_safe_extractall` writes outside `dest_dir`
IDs: CVE-2026-44340, GHSA-9q28-ghcr-c4x3
Record: https://patchnext.com/advisories/cve-2026-44340 (revision 3, 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: High (CVSS 8.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: praisonai 4.6.37. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI praisonai: affected <= 4.6.36; fixed in 4.6.37

## 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-9q28-ghcr-c4x3 (OSV record GHSA-9q28-ghcr-c4x3 lists affected ranges: PyPI praisonai >=0 <4.6.37 (fixed))
- Verified: https://github.com/advisories/GHSA-9q28-ghcr-c4x3 (GitHub-reviewed advisory GHSA-9q28-ghcr-c4x3 lists affected ranges: PyPI praisonai >=0 <=4.6.36)

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