test(security): pin explicit new-context link policy - #206
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Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🟡 Moderate · up to The new test may allow future reverse-tabnabbing vulnerabilities to pass CI because it does not reliably inspect HTML attributes or rel tokens. Use structural HTML parsing before merging. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Reviewed commit: 231b2c123b
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| if 'target="_blank"' in link or "target='_blank'" in link: | ||
| # Check for noopener and noreferrer anywhere in the tag | ||
| has_noopener = 'noopener' in link | ||
| has_noreferrer = 'noreferrer' in link |
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When a future link contains these words outside the rel token list, this test passes without providing either protection; for example, rel="noopener-noreferrer" makes both substring checks true even though the browser recognizes neither required token. A syntactically valid form such as target = "_blank" also bypasses the check entirely. Parse the anchor attributes and compare _blank and the whitespace-separated rel tokens instead.
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Actionable comments posted: 1
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Inline comments:
In `@tests/test_index_security.py`:
- Around line 69-74: Update the link checks in the test to parse anchor
attributes structurally with html.parser.HTMLParser, normalize target values so
spacing and quoting variations detect _blank, and validate noopener and
noreferrer as tokens from the rel attribute only. Preserve case-insensitive
handling and ensure unrelated attributes such as href cannot satisfy the rel
requirements.
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CHANGELOG.mdtests/test_index_security.py
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목적
현재 메인 페이지의
target="_blank"링크가 명시적인 opener 격리와 referrer 비공개 정책을 계속 유지하는지 regression으로 고정합니다. 신규 취약점을 수정하는 PR이 아니라 이미 존재하는 product policy의 회귀 방지입니다.exact-head repair
7b921c0451e02c1563ae2644d3219a6d29cd3a43HTMLParser기반으로 교체했습니다. 이제 실제<a>attribute를 파싱하고rel을 토큰 단위로 검증하며, 검사 대상 링크가 0개여서 vacuous pass하는 경우도 실패합니다.noopener noreferrer전체를 Reverse Tabnabbing 방지책 하나로 설명하던 문구를 고쳤습니다.noopener와noreferrer의 계약을 분리해 기록합니다.표준 근거와 경계
WHATWG HTML/MDN의 현재 동작에서
target="_blank"는 최신 브라우저에서 이미 implicitnoopener동작을 제공합니다. 따라서 명시적rel="noopener"유지는 defense-in-depth와 policy clarity의 의미이며, 누락 즉시 새로운 reverse-tabnabbing 취약점이 생긴다고 과장하지 않습니다.noreferrer는 별도의 privacy/referrer 정책입니다. navigation 시 referrer 정보를 보내지 않으며 같은 조건에서noopener동작도 함의합니다. 이 저장소는 현재 shipped new-context links에 둘을 모두 명시하고 있으므로 regression은 그 product-local 계약을 고정합니다.Primary references:
noreferrer: https://html.spec.whatwg.org/multipage/links.html#link-type-noreferrerrel=noopener: https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes/rel/noopenerrel=noreferrer: https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes/rel/noreferrerPromotion gate
현재 source/test 계약은 정적 regression 범위입니다. exact-head pytest와 hosted security checks가 terminal GREEN이 된 뒤에만 Ready로 올립니다. #204의 접근성용 localized new-window warning은 별도 사용자 계약이며 이 PR은 그
aria-describedby경로를 대체하거나 중복 구현하지 않습니다. force-push, self-approval, gate weakening은 사용하지 않습니다.