CVE-2026-34937 json
PraisonAI: Shell Injection in run_python() via Unescaped $() Substitution
published 7mo ago modified 3mo ago also EUVD-2026-18917 , GHSA-w37c-qqfp-c67f , PYSEC-2026-2954
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
Summary
PraisonAI is a multi-agent teams system. Prior to version 1.5.90, run_python() in praisonai constructs a shell command string by interpolating user-controlled code into python3 -c "<code>" and passing it to subprocess.run(..., shell=True). The escaping logic only handles \ and ", leaving $() and backtick substitutions unescaped, allowing arbitrary OS command execution before Python is invoked. This issue has been patched in version 1.5.90.
Patch / fix
- pypi praisonaiagents 1.5.90
- praison praisonaiagents 1.5.90
Is CVE-2026-34937 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 7mo ago
Exploit prediction
0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-w37c-qqfp-c67f referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | praisonaiagents | <1.5.90 |
1.5.90 |
Affected products
- MervinPraison PraisonAI
Classification
- Weakness
-
- CWE-78 Improper Neutralization of Special Elements used in an OS Command
References
-
github.com
/MervinPraison/PraisonAI/security/advisories/GHSA-w37c-qqfp-c67f
exploit, web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-34937
advisory
-
github.com
/MervinPraison/PraisonAI
package
-
pypi.org
/project/praisonaiagents
package
-
github.com
/advisories/GHSA-w37c-qqfp-c67f
advisory
Sources
- CVE List CVE-2026-34937
- GitHub Advisory GHSA-w37c-qqfp-c67f
- NVD CVE-2026-34937
- OSV PYSEC-2026-2954
Fencer Intel 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.