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…hell injection, path traversal) handle_logs and handle_job_get put a URL segment straight into a shell string. With the fleet token that was a whitelist bypass for /exec: a build of master answers /logs/x;id with 200 and runs the tail loop on it (8 of 11 checks in tools/fleet/check_ident.sh fail on master, 0 on this build). safe_ident allows [A-Za-z0-9_.-], refuses empty, over 64 chars and '..', with the primitives the agent already links. The 2026-08-28 binaries deployed on the three Macs already refused these, but from a source that is not on master; this makes the source and the binary agree. Suite 203/203. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018TygXw4GBESE8yTUipXWf4
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handle_logs and handle_job_get put a URL segment straight into a shell string. With the fleet token that was a whitelist bypass for /exec: a build of master answers
/logs/x;idwith 200 and runs the tail loop on it.tools/fleet/check_ident.shdrives a live agent with raw metacharacters: 8 of 11 checks fail on master's build, 0 on this branch.safe_identallows[A-Za-z0-9_.-], refuses empty, over 64 chars and.., using only the primitives the agent already links (the stdlib string module is not part of the agent build). Suite 203/203.The 2026-08-28 binaries on the three Macs already refused these, from a source that is not on master; the fixed build is being deployed so source and binary agree.
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https://claude.ai/code/session_018TygXw4GBESE8yTUipXWf4