CVE-2026-108595CWE-863broken-access-control

CVE-2026-108595

Medium · published October 10, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
16.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS v4.0
6.0 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00260 · 16.7th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-10-10T23:16Z
References (6)
https://github.com/pulseaiclub/phi · [email protected]https://github.com/pulseaiclub/phi/blob/5b3cb440a7c58115ef64283a737a43299f2805a4/internal/agent/engine_runner.go#L52-L60 · [email protected]https://github.com/pulseaiclub/phi/blob/5b3cb440a7c58115ef64283a737a43299f2805a4/internal/tools/agenttool/agent.go#L106-L120 · [email protected]https://hackmd.io/@haind/phi-subagent-workdir-workspace-escape · [email protected]https://www.vulncheck.com/advisories/phi-0.3.0-through-0.28.4-permission-bypass-via-agent-spawn-workdir · [email protected]https://hackmd.io/@haind/phi-subagent-workdir-workspace-escape · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 12 OCT 03:26Z
    EPSS moved — → 0%
    epss
  • 10 OCT 18:16Z
    Phi 0.3.0 through 0.28.4 Permission Bypass via agent_spawn Workdir
    cvelistv5
  • 10 OCT 18:16Z
    Phi 0.3.0 through 0.28.4 Permission Bypass via agent_spawn Workdir
    cvelistv5