What’s Vulnerable › Vulnerabilities

CVE-2026-77930: EvoScientist 0.1.0 before 0.2.5 Human Approval Bypass via Async Sub-Agents

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-20 · updated 2026-10-22
• Weakness: CWE-862

Description

EvoScientist 0.1.0 before 0.2.5 contains an approval bypass vulnerability that allows attackers to run host shell commands by delegating them to async sub-agents lacking an interrupt_on gate. Attackers can plant instructions in ingested content such as fetched web pages, so the agent calls start_async_task and runs commands with user privileges and environment secrets.

Affected products

• EvoScientist: from 0.1.0 before 0.2.5 — fixed in 0.2.5

How to fix

Upgrade to a fixed version: EvoScientist 0.2.5. Check the vendor advisory for mitigations.

References

• https://github.com/EvoScientist/EvoScientist/blob/ac58caab7bdd1706f3fee55891f611cd175d05b0/EvoScientist/subagents/_factory.py#L116
• https://github.com/EvoScientist/EvoScientist/commit/d249e320bd856a7d31d859cfbb2bf75bab6c8686
• https://github.com/EvoScientist/EvoScientist/issues/387
• https://github.com/EvoScientist/EvoScientist/releases/tag/v0.2.5
• https://www.lasso.security/vulnerability-database/cve-2026-77930
• https://www.vulncheck.com/advisories/evoscientist-0.1.0-before-0.2.5-human-approval-bypass-via-async-sub-agents

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