fix: prevent ReDoS in UriTemplate regex patterns (v1.x backport)#1365
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fix: prevent ReDoS in UriTemplate regex patterns (v1.x backport)#1365
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The exploded array handling regex patterns were vulnerable to ReDoS attacks. Changed [^/]+ to [^/,]+ in the character class to prevent catastrophic backtracking. CVE-2026-0621 Fixes #965
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hmm changesets don't exist on the v1.x branch, we should probably fix that notification |
bhosmer-ant
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Jan 7, 2026
joeyorlando
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Jan 7, 2026
See modelcontextprotocol/typescript-sdk#1365 Closes https://github.com/archestra-ai/archestra/security/dependabot/70 <!-- CURSOR_SUMMARY --> --- > [!NOTE] > <sup>[Cursor Bugbot](https://cursor.com/dashboard?tab=bugbot) is generating a summary for commit dc193e5. Configure [here](https://cursor.com/dashboard?tab=bugbot).</sup> <!-- /CURSOR_SUMMARY -->
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Summary
Backport of the ReDoS fix from #1363 to the v1.x branch.
Changes
The exploded array handling regex patterns in
UriTemplatewere vulnerable to ReDoS (Regular Expression Denial of Service) attacks. Changed[^/]+to[^/,]+in the character class to prevent catastrophic backtracking when matching malicious input.Security Impact
Changes Made
Testing
All existing tests pass, plus two new security regression tests that verify the fix prevents the ReDoS vulnerability.
Version
Bumped to v1.25.2 for patch release.
Fixes #965