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proposal(redact): prevent retention of confidential vector paths behind clipping (F-008) (#4577)

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Partial vector redaction previously hid covered areas with clipping
(`clip_out`, `W/W*`) while retaining the complete original drawing instructions
and painting operators in the content stream. This allowed recipients
to recover confidential outlined text or other vector drawings from
supposedly redacted documents.

This change removes vector paths that intersect redaction marks completely
and refuses partial clip retention, ensuring no confidential geometry is
preserved behind clipping. Report counts are updated to record removed paths.
This commit is contained in:
Dylan M. Taylor
2026-10-25 16:14:06 -04:00
committed by GitHub
parent 86a4120ae0
commit 833cd63c8a
3 changed files with 34 additions and 31 deletions
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parity/acrobat-features.toml
+1 -1
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@@ -5793,7 +5793,7 @@ status = "shipped"
commands = ["redact.apply"]
tools = ["redact_apply"]
evidence = ["crates/redact/src/tests.rs::vectors_are_removed_or_clipped_and_inline_images_go"]
notes = "covered paths removed, others clipped; shadings clipped"
notes = "intersecting paths removed to avoid leaking geometry behind clipping; shadings clipped"
[[feature]]
id = "protect.redact-annots-fields"