Files
graphify/graphify/extractors
safishamsiandClaude Opus 4.8 e1d9deed6a security(fortran): strip #include directives before cpp (GHSA-pcc4-rvhr-2pr8)
The Fortran capital-F cpp step relied on -nostdinc -I /dev/null to block
#include-based host-file reads, but cpp always searches the source file's
own directory for quoted includes and always honours absolute paths
regardless of those flags. A malicious .F/.F90 file with
#include "/etc/passwd" or #include "../../../secret" could inline
arbitrary host files into graph.json/GRAPH_REPORT.md and the LLM context
on the default offline path (CWE-22/73/200, high severity).

Strip every #include directive before preprocessing and feed the
sanitized source to cpp on stdin, so cpp never opens the file's directory
or any absolute/traversing include path. Macro expansion (#define/#ifdef,
the actual reason capital-F files need cpp) is preserved; cross-file
include fidelity is traded away to close the arbitrary-read vector.
Feeding stdin also removes the -I/etc/x.F90 argument-injection edge case.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-09-27 18:56:31 +01:00
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