How severe is CVE-2026-40153?

CVE-2026-40153 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-40153 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40153?

CVE-2026-40153 affects Praison Praisonaiagents. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40153?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-40153 have an EU (EUVD) identifier?

Yes. CVE-2026-40153 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21176.

When was CVE-2026-40153 published?

CVE-2026-40153 was published on 2026-04-09 and last updated on 2026-06-17.

CVE-2026-40153

CVE-2026-40153 is a high-severity vulnerability in Praison Praisonaiagents with a CVSS 3.x base score of 7.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-526.

Key facts

Severity: High (CVSS 3.x base score 7.4)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21176
Weakness: CWE-526
Affected product: Praison Praisonaiagents
Published: 2026-04-09
Last modified: 2026-06-17

Description

PraisonAIAgents is a multi-agent teams system. Prior to 1.5.128, the execute_command function in shell_tools.py calls os.path.expandvars() on every command argument at line 64, manually re-implementing shell-level environment variable expansion despite using shell=False (line 88) for security. This allows exfiltration of secrets stored in environment variables (database credentials, API keys, cloud access keys). The approval system displays the unexpanded $VAR references to human reviewers, creating a deceptive approval where the displayed command differs from what actually executes. This vulnerability is fixed in 1.5.128.

Frequently asked questions

What is CVE-2026-40153?: PraisonAIAgents is a multi-agent teams system. Prior to 1.5.128, the execute_command function in shell_tools.py calls os.path.expandvars() on every command argument at line 64, manually re-implementing shell-level environment variable expansion despite using shell=False (line 88) for security. This allows exfiltration of secrets stored in environment variables (database credentials, API keys, cloud access keys). The approval system displays the unexpanded $VAR references to human reviewers, creating a deceptive approval where the displayed command differs from what actually executes. This vulnerability is fixed in 1.5.128.
How severe is CVE-2026-40153?: CVE-2026-40153 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-40153 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40153?: CVE-2026-40153 affects Praison Praisonaiagents. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40153?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-40153 have an EU (EUVD) identifier?: Yes. CVE-2026-40153 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21176.
When was CVE-2026-40153 published?: CVE-2026-40153 was published on 2026-04-09 and last updated on 2026-06-17.

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-v8g7-9q6v-p3x8

Affected products (1)

cpe:2.3:a:praison:praisonaiagents:*:*:*:*:*:*:*:*

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