fix: stop treating semicolons as query parameter separators#787
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Since Go 1.17, net/url.ParseQuery no longer splits query parameters on semicolons, in compliance with the URL Living Standard. However, findFirstQueryKey still used bytes.IndexAny(foundKey, "&;") which split on both ampersands and semicolons. This created a parser differential between mux.Vars and net/url that could lead to security vulnerabilities such as broken access control and web cache poisoning. Change bytes.IndexAny(foundKey, "&;") to bytes.IndexByte(foundKey, '&') so that only ampersands are recognized as separators. Fixes gorilla#781 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Friendly ping - any chance someone could take a look at this when they get a chance? Happy to make any changes if needed. |
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just wanted to follow up on this — is there anything blocking it from getting reviewed? |
epaes90
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Mar 14, 2026
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Argus Code Review
Score: 100/100
Reviewed 2 files with no issues found. Highlights: Test coverage is present; Changes are focused and well-scoped; No security, performance, or quality issues detected. Score: 100/100.
No inline findings to report.
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