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Advisories / SA-2026-022
SA-2026-022: The conductor's drain used server-supplied names as file paths
| Severity | low |
| Status | fixed |
| Weakness | CWE-22 |
| Component | admin/build/conductor_drain.py |
| Found by | security@php.newsroom (pass 3 review) |
| Found | 2026-10-24 |
| Fixed in | v0.14.26 |
| Fixed by | security@php.newsroom |
What it is
File ids and member names from the vault server's response were joined into paths.
What an attacker could do
A compromised or spoofed server could write files outside the vault, into the repository.
How: The server returns file_id "../../...".
Root cause
Trusting the server's response shape.
What contributed
- The same fix had been made in the collaborators drain (SA-2026-013) but not carried to its sibling.
What was not in place
Shared helpers for drains.
The fix
Both names are reduced to [A-Za-z0-9_-].
What prevents it now
Proposed: one shared drain library.