Files
Open_Ultra_SAST/tests
Marius CiepluchandClaude Opus 5 92677136d7 fix(cpg): a batch goes through a file, not the command line
Scanning a 637-file WordPress plugin reported 500 regions examined, zero
findings, and a taint query time of **0.05 seconds** -- less than a JVM
takes to start. Dominance ran for 29.56s and config for 22.44s in the same
scan, so only taint had failed.

Linux caps a SINGLE argument at MAX_ARG_STRLEN (128KB) whatever ARG_MAX
says. Measured on that plugin:

  taint      2500 requests   1.49 MB   <- over the cap
  dominance    13 requests   0.04 MB
  config       13 requests   0.00 MB

As `--param requests=<json>` execve returned E2BIG, `_run` caught the
OSError, `query_batch` returned {} -- and {} reads as "no rows found". Only
taint crossed the cap, which is exactly why the failure looked like a
result rather than an error.

This is the quiet failure the rung ladder cannot catch. Every other honesty
mechanism in this codebase labels a verdict; here no verdict was produced
to label, and a scan of a vulnerable plugin reported it clean.

The payload is now staged to a file beside the CPG and the path is passed
instead; all three queries read `requestsFile` when it is set and keep
`requests` for the single-request forms and the tests. A test asserts no
argument approaches the cap, since the failure mode is invisible at the
scale the unit tests run at -- batching worked on every small tree it was
ever tried on.

Verified on vampi first: 4 entailed, unchanged, all three known
vulnerabilities still found.

Gates byte-identical.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01T7XD7x5KonMdmGRkp63EQG
2026-09-09 16:27:58 +02:00
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