Approval bypass in EvoScientist lets attackers run host shell commands
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
EvoScientist from 0.1.0 before 0.2.5 has a missing authorization flaw (CWE-862) in which async sub-agents lack a human approval gate. A remote attacker with no privileges can plant instructions in ingested content such as fetched web pages, causing the agent to call start_async_task and run host shell commands with user privileges and access to environment secrets. A public exploit is linked in the references.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| EvoScientist | EvoScientist | 0.1.0 to before 0.2.5 | 0.2.5 | Patch available | CNA |
- EvoScientist VendorEvoScientist Affected 0.1.0 to before 0.2.5 Fixed in 0.2.5 Patch available CNA
Remediation
Upgrade EvoScientist to version 0.2.5, which is the fixed version.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
- Fix · CNA EvoScientist (EvoScientist) Fixed in 0.2.5
Timeline
- 2026-10-20 Threatist record created from CVE-2026-77930
- 2026-10-20 CISA SSVC decision points changed
- 2026-10-20 Priority changed: MEDIUM → HIGH
- 2026-10-23 CVSS score changed · CNA
- 2026-10-25 EPSS moved to the 50th–90th percentile
References
Exploit 1
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences