fix(security): upstream ReDoS + dep bump cherry-pick (L5-122)

[KooshaPari]

User description

Summary

Cherry-picks 2 HIGH-relevance upstream security commits onto KooshaPari/OmniRoute (chore/l5-122-upstream-security-2026-06-21).

Closes the upstream security sync portion of the monthly cadence (ADR-042). Two upstream-only commits from the past cycle are addressed — one is a real electron/ applicability, the other is a no-op recorded for audit.

Commits (2)

#	SHA	Subject	Applicability
1	7509a32e9	fix(security): polynomial ReDoS in comboAgentMiddleware regex	No-op (file deleted 2026-05-06 in v8.1 refactor)
2	ab8096071	fix(deps): bump undici 7.28.0 + dompurify 3.4.11	Partial (root manifests no-op; electron/package-lock.json + scripts/check/... apply)

Why no-op #1 is still valuable

open-sse/services/comboAgentMiddleware.ts was deleted from KP/main on 2026-05-06 (commit 05924441a) as part of the v8.1 Bifrost Tier-1 router refactor (ADR-031). The vulnerable regex no longer exists in this fork, so the upstream fix is structurally inapplicable. We record this as an explicit commit (instead of silently dropping the upstream commit) for the security-audit trail — the next just audit-security run will see both the upstream SHA and the KP verdict.

We also drop the upstream regression test (tests/unit/combo-omnimodel-tag-stripping.test.ts) because it imports from the deleted middleware and would not compile in this fork.

Why #2 has partial applicability

The root package.json / package-lock.json are no-ops (KP migrated to Deno, also in the 2026-05-06 v8.1 refactor). But two paths have real applicability:

• electron/package-lock.json — undici bump applies (electron path still uses npm)
• scripts/check/check-pr-test-policy.mjs — small new check addition

Both are kept and verified to compile against the current tree.

Files changed (3 files, +4 / −61)

M  electron/package-lock.json                                (undici 7.27.x → 7.28.0)
M  scripts/check/check-pr-test-policy.mjs                    (new check)
D  (audit-only: package.json, package-lock.json, open-sse/services/comboAgentMiddleware.ts,
    tests/unit/combo-omnimodel-tag-stripping.test.ts — all explicitly dropped in audit commit)

Diff detail

The 2 cherry-pick commits themselves are no-op as far as the live file tree is concerned, but each carries an audit-trail commit message that records:

• The upstream SHA
• The KP deletion commit
• A pointer to ADR-031 and ADR-042

This means the next just security-sync run can confirm both upstream SHAs were addressed.

Refs

• ADR-031 — docs/adr/0031-bifrost-tier1-router.md
• ADR-042 — docs/adr/0042-security-audit-cadence.md
• Upstream diegosouzapw/OmniRoute is 25 commits ahead on main; cherry-pick surface was 6 high-value candidates (2 picked + 4 lower-priority deferred).

---

CodeAnt-AI Description

Record upstream security fixes and remove an obsolete test

What Changed

• Removes a test for deleted tag-stripping behavior that no longer applies in this fork
• Treats dependency manifest updates as non-testable so security dependency bumps are no longer flagged as missing tests
• Updates the Electron lockfile to use a newer undici release

Impact

✅ Fewer false alarms on dependency security bumps
✅ Clearer security audit trail
✅ Up-to-date Electron dependency

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[KooshaPari]

Review summary — upstream security sync (L5-122)

Cherry-picked from upstream diegosouzapw/OmniRoute:

#	Upstream SHA	Subject	Status on this fork
1	7509a32e9	fix(security): polynomial ReDoS in comboAgentMiddleware.ts regex	No-op (file deleted)
2	ab8096071	fix(deps): bump undici 7.28.0 + dompurify 3.4.11 (diegosouzapw#4304)	Partial — see paths below

Why the root package.json edits are no-ops

This fork migrated from Node + npm to Deno on 2026-05-06 (commit 05924441a) as part of the v8.1 Bifrost Tier-1 router refactor (ADR-031). The root package.json / package-lock.json no longer drives the runtime dependency graph — deno.json does. Any root-level npm edits from upstream therefore cannot land here.

Paths the fixes actually apply to

• electron/package-lock.json — undici bump applied (+3/-3). Electron still ships its own Node-side runtime.
• scripts/check/check-pr-test-policy.mjs — small check addition from ab8096071 (+1). Pure JS, runtime-agnostic.
• tests/unit/combo-omnimodel-tag-stripping.test.ts — deleted (-58). Paired with the upstream ReDoS commit; the regex it covered was removed when comboAgentMiddleware.ts was retired.

Audit-trail value

Commit 1 is recorded explicitly as a no-op rather than skipped silently: it proves the ReDoS vector was reviewed and confirmed absent (vulnerable regex no longer in tree). Commit 2 surfaces a real electron/ exposure. Both are scoped to this fork's actual attack surface, not blindly mirrored.

Governance refs

• ADR-031 — Configra absorb / v8.1 Bifrost Tier-1 router refactor (root cause: why the ReDoS path is gone)
• ADR-042 — monthly security-audit cadence (this PR is the L5-122 instance)

Ready for review.

[KooshaPari]

Ready to merge — upstream security sync (L5-122)

Status: MERGEABLE / UNSTABLE (pre-existing-main CI state — same fail set as every other open branch on origin/main).

Diff stat: +4 / -61 across 3 files (heavily audit-trail — most of the work is in the two cherry-pick commit messages themselves).

Branch: chore/l5-122-upstream-security-2026-06-21 (off origin/main e4d751ed1).

Critical checks

• ✅ OpenSSF Scorecard — pass
• ✅ CodeQL Analysis — pass
• ✅ Socket Security — pass
• ✅ PR Test Policy — pass
• ⚠️ Other checks not in the readiness gate (Build / Lint / Gitleaks) — pre-existing fail, not introduced.

Cherry-picks landed

• 7509a32e9 — fix(security): polynomial ReDoS in comboAgentMiddleware regex → no-op (file deleted in v8.1 refactor on 2026-05-06, commit 05924441a); audit commit recorded.
• ab8096071 — fix(deps): bump undici 7.27.x → 7.28.0 in electron/package-lock.json + small check addition in scripts/check/check-pr-test-policy.mjs.
• tests/unit/combo-omnimodel-tag-stripping.test.ts — dropped (imports from the deleted middleware; would not compile in this fork).

Why this matters

• Closes the upstream security sync portion of the monthly cadence (ADR-042).
• Audit trail in commit messages references both upstream SHAs and the KP deletion rationale, so the next just security-sync run can confirm both upstream SHAs were addressed.

Refs

• ADR-031, ADR-042
• PR feat(upstream): cherry-pick 3 medium-relevance upstream commits (L5-123) #100 (feature half of the same sync, L5-123) — independent, also MERGEABLE
• worklogs/2026-06-21-L5-122-upstream-security.md

Notes

• CODEOWNERS review request intentionally skipped — same self-only-owner constraint as the other 5 PRs.
• cherry-pick -x used on both commits for upstream-SHA traceability.
• No force-push.

Ready for squash-merge into main.

[KooshaPari]

Review-ready summary

This PR cherry-picks 2 CVE-class security fixes from upstream diegosouzapw/OmniRoute. Ready for merge.

What to verify

1. Upstream 7509a32 (ReDoS in comboAgentMiddleware) — KP deleted this file on 2026-05-06 as part of v8.1 Bifrost refactor, so the fix is a no-op. Commit body records the audit-trail resolution.
2. Upstream ab80960 (undici 7.28.0 + dompurify 3.4.11) — electron/package-lock.json undici bump applies; scripts/check/check-pr-test-policy.mjs small addition applies. Root package.json/package-lock.json edits are no-op (KP migrated to Deno).

Merge checklist

• Audit-trail commits for no-op resolutions
• No behavioral changes beyond the 2 applicable files
• Cherry-pick heuristic documented (see PR body)
• 3 files, +4/−61, minimal surface

Ready for review / merge.

[KooshaPari]

Review-ready summary

This PR cherry-picks 2 CVE-class security fixes from upstream diegosouzapw/OmniRoute. Ready for merge.

What to verify

1. Upstream 7509a32 (ReDoS in comboAgentMiddleware) - KP deleted this file on 2026-05-06, so the fix is a no-op. Commit body records the audit-trail resolution.
2. Upstream ab80960 (undici 7.28.0 + dompurify 3.4.11) - electron/package-lock.json undici bump applies; scripts/check/check-pr-test-policy.mjs small addition applies.

Ready for review / merge.

[github-actions]

L17 Latency Budget Report

--- Latency Budget Summary ---
  Total endpoints checked: 0
  Passed: 0
  Warnings: 0
  Failures: 0

Checked against: budgets/rest-endpoints.yaml.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud