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

← Context & Harness Attacks · markdown

official advisory (Vikunja GHSA-cvh3-hf56-g9xm / GHSA-3v4w-4754-gmfj, Nov 8); low severity

Vikunja's veans coding-agent hook pasted project titles and task text into the agent's authoritative instructions, letting any project writer steer it (CVE-2026-123498, fixed in 2.7.1)

  • Update veans to 2.7.1.
  • For any agent hook you write: put tracker or ticket text in a clearly marked untrusted section, never in system or project instructions.

Sources: GitHub Advisory: GHSA-3v4w-4754-gmfj · Vikunja advisory GHSA-cvh3-hf56-g9xm