chore(deps): update dependency microsoft.identity.client.extensions.msal to 4.82.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
Microsoft.Identity.Client.Extensions.Msal (source)	4.78.0 → 4.82.1

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Release Notes

AzureAD/microsoft-authentication-library-for-dotnet (Microsoft.Identity.Client.Extensions.Msal)

v4.82.1

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Bug Fixes

• Remove experimental flag requirement from IAuthenticationOperation #​5699
• Add security warning to ICustomWebUi documentation #​5704

Changes

• Adds support for implicit mTLS (Mutual TLS) transport for client assertion delegates #​5670

v4.82.0

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Highlights

This release expands extensibility for confidential-client authentication (certificates + client assertions), adds additional sovereign cloud environments, and hardens security-sensitive flows (mTLS PoP and system browser auth) with clearer validation and safer defaults.

Features

• Certificate-based confidential client extensibility: Introduced CertificateOptions and updated WithCertificate extensibility APIs to accept it, including support for passing sendX5C configuration through the options model. (#​5655)
• Sovereign cloud support: Added instance discovery / authority validation support for Bleu (France), Delos (Germany), and GovSG (Singapore) cloud environments. (#​5671)
• Client assertion customization: Added WithExtraClientAssertionClaims on AcquireTokenForClientParameterBuilder to enable supplying additional signed claims in client assertions (intended for advanced scenarios and higher-level libraries). (#​5650)
• mTLS PoP guardrails: Added validation and explicit error handling when mTLS PoP is requested for unsupported environments and/or non-login.* hosts. (#​5684)
• System browser hardening: Added response_mode=form_post support for the default system browser (loopback) flow. MSAL will enforce form_post and process the authorization response from POST data. (#​5678)

Changes

• Key Attestation packaging rename: Microsoft.Identity.Client.MtlsPop renamed to Microsoft.Identity.Client.KeyAttestation (assembly/package naming update). (#​5653)

v4.81.0

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Bug Fixes

• Updated the ConfidentialClientApplication's ROPC API to add WithSendX5C() during authentication requests.#​5637

v4.80.0

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Features

• Added extensibility APIs—WithCertificate, OnMsalServiceFailure, and OnCompletion—to enable callback handling for certificate injection, retry on MSAL service failure events, and completion notifications #​5573
• Extend IAuthenticationOperation interface with Async methods in IAuthenticationOperation2 #​5376
• Enable IAuthenticationOperation2 to reject MSAL cached tokens and fetch new ones from ESTS #​5567

Changes

• IMDS Source Detection Logic Improvement #​5602
• Update DesktopOsHelper.IsMac to work properly on .NET 10 + macOS 26 #​5541

Bug Fixes

• Fix KeyNotFoundException during retry when headers lack correlation ID #​5617
• Implement Service Exception for IMDS Probe #​5615

v4.79.2

What's Changed

• Bump winsdk dependency by @​bgavrilMS in #​5575
• ImdsV2 probe does not fire when .WithMtlsProofOfPossesstion is not used by @​Robbie-Microsoft in #​5579
• Downgrade System.Formats.Asn1 to match ID web by @​Avery-Dunn in #​5583

Full Changelog: AzureAD/microsoft-authentication-library-for-dotnet@4.79.0...4.79.2

v4.79.1

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Dependency Update

This hotfix release addresses compatibility between MSAL.NET and Microsoft.Identity.Web by downgrading the System.Formats.Asn1 dependency from version 9.0.8 to 8.0.1.

What Changed

• System.Formats.Asn1 downgraded to v8.0.1 (#​5583)
  • Ensures compatibility with Microsoft.Identity.Web and other dependencies

Why This Release

MSAL.NET 4.79.0 introduced a dependency on System.Formats.Asn1 9.0.8, which created version conflicts with Microsoft.Identity.Web and other packages that require System.Formats.Asn1 8.0.1. This hotfix resolves those conflicts to maintain ecosystem compatibility.

v4.79.0

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Changes

• Managed Identity IMDSv2 and new support APIs (ResetForTest, GetSourceAsync) in #​5501
• Bearer Requests should Fallback to IMDS in Preview in #​5562
• Updating MSAL to send client info = 2 on client credential flow in #​5529
• Make IMsalMtlsHttpClientFactory interface public in #​5559* Adjust WithExtraQueryParameters APIs and cache key behavior #​5536

Bug fixes

• Fix instance discovery bug in Fr cloud #​5549
• Mark WithClientAssertion API as experimental #​5551

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