CVE-2026-108595Phi 0.3.0 through 0.28.4 Permission Bypass via agent_spawn Workdir
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Phi 0.3.0 through 0.28.4 contains a permission bypass vulnerability that allows spawned sub-agents to escape workspace_only_writes and readonly mode by supplying an unchecked workdir to agent_spawn. Attackers can plant prompt-injected instructions in processed content so the agent spawns a worker rooted elsewhere, causing unapproved file writes anywhere the user can write.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
- Weakness (CWE)
- CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 13, 2026
- First seen by InfoSec Signals
- Oct 10, 2026
Affected products
pulseaiclub phi pulseaiclub:phi (from the name) | from 0.3.0 through 0.28.4 | CNA record |
References
- https://hackmd.io/@haind/phi-subagent-workdir-workspace-escapethird-party-advisory
- https://github.com/pulseaiclub/phi/blob/5b3cb440a7c58115ef64283a737a43299f2805a4/internal/tools/agenttool/agent.go#L106-L120technical-description
- https://github.com/pulseaiclub/phi/blob/5b3cb440a7c58115ef64283a737a43299f2805a4/internal/agent/engine_runner.go#L52-L60technical-description
- https://github.com/pulseaiclub/phiproduct
- https://www.vulncheck.com/advisories/phi-0.3.0-through-0.28.4-permission-bypass-via-agent-spawn-workdirthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.