[ctx]ctxseccontext security: attacks on the harness and context layer of AI agents, plus exploited-now news, hunting and playbooks.

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official (Chartbrew GitHub Security Advisories, incl. GHSA-qvv4-r3q6-8797 Critical CVSS 9.8); CVE records surfaced publicly around Nov 6 for the earlier advisory set; not in CISA KEV

Chartbrew: default CB_SECRET lets anyone forge JWTs for any user (GHSA-qvv4, CVSS 9.8) — rotate secrets and upgrade now

  • Do now: inspect CB_SECRET / CB_ENCRYPTION_KEY; if CB_SECRET is the template value or empty-but-set, treat the instance as fully compromised for session purposes — rotate both secrets, force re-login, and upgrade to the current Chartbrew release that rejects the old placeholder path.
  • Review Chartbrew's security advisories list for the sibling Critical/High items (BullMQ dashboard, SSRF, SQLi, share-token forgery) on the same deploy.
  • Internet-exposed Chartbrew with default env is the urgent case; air-gapped lab boxes still need the secret rotation before they are published.

Sources: GitHub Advisory GHSA-qvv4-r3q6-8797: Full account takeover via JWTs under default CB_SECRET · Chartbrew security advisories index