SEC-05　Browser data read

block 0 hits here sandbox-verified

① What it stops

Agent attempted to read browser stored data (cookies, passwords, sessions)

Browser profiles contain live sessions; deny all agent access to profile directories.

② Criteria

Item	Value
Severity	critical
Category	secrets
Gate	Gate 2 sensitive surface
Criterion type	tool_call
Applies to	Read、Bash

File path patterns

Cookies
Login\s+Data
Local\s+Storage
Web\s+Data

Generated directly from rules/default.json — never hand-written or paraphrased.

③ Real hits

2026-09-24T01:43:59+08:00 ✗ block [SEC-05] tool: Read　exit code: 2 criterion: path hit: Cookies

Triggered in a disposable sandbox project using the real hooks/pre_tool_use.py — the same method as challenge/generate_challenge.py. All 24 rules verified this way (24/24).

Zero hits in the 13-day ledger on this machine — we do not post a sample. Zero hits means this machine never hit it, not that the rule is dead; effectiveness is covered by the sandbox trigger above.

④ False positives & exemptions

Built-in exclude patterns are listed under ②. Four exemption mechanisms exist globally (declared workspace roots, policy path whitelist, path-suspect alert-only, exclude patterns); counts on this machine are published on the Chinese page and in Limits.

⑤ Boundaries

Boundary
Criterion type	tool_call
Applies to	Read、Bash
Platform	all platforms
Case sensitivity	Measured: insensitive (`RM -RF` is blocked like `rm -rf`)
Path normalisation	Measured: effective (`./sub/../.env` is blocked)
Scripts not parsed	An absolute path outside the project mentioned in a Bash command is alerted, not blocked — `scripts are not parsed (THREAT_MODEL Non-goals)`
Failure posture	fail-open; best-effort, not a hard security boundary

⑥ Reproduce

grep -h "SEC-05" .psl/audit/*.jsonl | head python challenge/generate_challenge.py python challenge/verify.py

Cite this page

Antinel AgentState. SEC-05 Browser data read — rule detail. https://antinel.com/en/agentstate/rules/SEC-05/ (accessed YYYY-MM-DD)

Antinel. (2026). SEC-05 Browser data read — rule detail. AgentState. https://antinel.com/en/agentstate/rules/SEC-05/

BibTeX

@misc{antinel_en_agentstate_rules_SEC_05,
  title        = {SEC-05 Browser data read — rule detail},
  author       = {{Antinel}},
  year         = {2026},
  url          = {https://antinel.com/en/agentstate/rules/SEC-05/},
  note         = {claim tier: measured}
}

Claim tier: measured　采集时刻：2026-09-23T22:41:18+08:00