Improve validation of "jku" claim (8.x)#3481
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kllysng merged 2 commits intoMay 19, 2026
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This was referenced Jun 2, 2026
Bump Microsoft.IdentityModel.JsonWebTokens from 8.18.0 to 8.19.0
Azure-Samples/azure-finops-agent#39
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This was referenced Jun 4, 2026
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chore(deps): Bump System.IdentityModel.Tokens.Jwt from 8.3.0 to 8.19.1
marcelocamargosjr/cashflow#59
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Currently, when validating the "jku" claim against the list from AllowedDomainsForJkuRetrieval we use Host.EndsWith for the string comparison, allowing invalid domains like "wrongcontoso.com" to bypass restrictions intended for "contoso.com"
This PR improves the validation by updating the domain matching to require either:
This is a cherry-pick of commit 6cec324 from
devtodev8x.Files changed:
src/Microsoft.IdentityModel.Protocols.SignedHttpRequest/SignedHttpRequestHandler.cstest/Microsoft.IdentityModel.Protocols.SignedHttpRequest.Tests/PopKeyResolvingTests.cs