CVE-2026-55540 json
PraisonAI: [Path Traversal] agent tools escape the configured workspace via symlinks
published 2026-08-25 2 mo ago modified 2026-09-10 1 mo ago also EUVD-2026-65512 , GHSA-ch89-h4r2-c8f8 , PYSEC-2026-3888
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 33%
- public exploits
- 0
- none known
Summary
PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.51, is_path_within_directory() uses os.path.abspath() rather than os.path.realpath() for the workspace boundary. A symlink inside workspace can point outside and still pass the check, allowing read_file and other code tools to access files outside the configured workspace. This issue is fixed in version 4.6.58.
Patch / fix
- pypi praisonai 4.6.58
- praison praisonai 4.6.58
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-ch89-h4r2-c8f8 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L |
| GitHub | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L |
| OSV | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | praisonai | <4.6.58 |
4.6.58 |
Affected products
- MervinPraison PraisonAI
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/MervinPraison/PraisonAI/commit/2f9677abb2ea68eab864ee8b6a828fd0141612e1
web
-
github.com
/MervinPraison/PraisonAI/security/advisories/GHSA-ch89-h4r2-c8f8
exploit, web
-
github.com
/MervinPraison/PraisonAI/releases/tag/v4.6.58
web
-
github.com
/MervinPraison/PraisonAI
package
-
pypi.org
/project/praisonai
package
-
github.com
/advisories/GHSA-ch89-h4r2-c8f8
advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-55540
advisory
Sources
- CVE List CVE-2026-55540
- GitHub Advisory GHSA-ch89-h4r2-c8f8
- NVD CVE-2026-55540
- OSV PYSEC-2026-3888
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.