← WebKit Silent-Fix Report — 2026-W34

f76f30efcb689ec60174addc19d38b9150b67c69  [SOUP] An Authorization header set by the page is replaced by cached credentials

severity low class LogicError confidence 0.55 SOUP auth credential cache
Yury Semikhatsky Tue Aug 18 19:10:24 2026 -0700 full: f76f30efcb689ec60174addc19d38b9150b67c69 bug report ↗ view on GitHub ↗
Primitive: Page-set Authorization header overridden by cached credentials
Triage note: Now sets DO_NOT_USE_AUTH_CACHE when the request already has an Authorization header, preventing cached credentials from replacing page-supplied auth; a credential-handling logic fix.

Security-relevant, below the exploitable-grade bar for a full root-cause writeup. The triage verdict is above; the side-by-side patch is below.

Before / after

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