fix: upgrade authlib to 1.6.9 (CVE-2026-27962)

[orbisai0security]

Summary

Upgrade authlib from 1.6.5 to 1.6.9 to fix CVE-2026-27962.

Vulnerability

Field	Value
ID	CVE-2026-27962
Severity	CRITICAL
Scanner	trivy
Rule	CVE-2026-27962
File	uv.lock

Description: authlib: Authlib: Authentication bypass due to JWK Header Injection vulnerability

Changes

• uv.lock

Verification

• Build passes
• Scanner re-scan confirms fix
• LLM code review passed

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Automated security fix by OrbisAI Security

[akseljoonas]

@claude please review this PR. Focus on correctness, security, LiteLLM/Bedrock routing impact, and whether it's safe to merge against current main. Keep it concise and prefer inline comments where it matters.

[claude]

Claude finished @akseljoonas's task in 2m 1s —— View job

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PR Review: fix: upgrade authlib to 1.6.9 (CVE-2026-27962)

• Read CLAUDE.md for repo guidelines
• Examine the diff and lock file changes
• Verify CVE validity and authlib version correctness
• Assess LiteLLM/Bedrock routing impact
• Check safety against current main
• Post final review

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Summary

This PR is from an automated security bot (orbisai0security, email: mediratta01.pally@gmail.com). It upgrades authlib in uv.lock to fix CVE-2026-27962 (JWK Header Injection / authentication bypass). The changes look mechanically correct but have several issues worth reviewing before merging.

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Findings

🔴 PR title vs actual change mismatch

The PR title says "upgrade authlib to 1.6.9" but the lock file actually upgrades to 1.7.0. This discrepancy signals the bot's PR description is unreliable.

-version = "1.6.5"
+version = "1.7.0"   # <-- not 1.6.9 as stated in the title

This matters because if 1.6.9 is the actual CVE fix and 1.7.0 is a separate major-revision bump, merging this introduces more change than necessary for the security fix.

🟡 New transitive dependency introduced

authlib 1.7.0 adds joserfc as a new required dependency (not present in 1.6.5). This is a new package in the dependency graph that should be vetted:

 dependencies = [
     { name = "cryptography" },
+    { name = "joserfc" },   # new package, v1.6.4
 ]

joserfc is a JOSE/JWK library that authlib now delegates to — a significant internal architecture change for what was described as a patch.

🟢 No LiteLLM/Bedrock routing impact

authlib is only a transitive dep of fastmcp, not of litellm (confirmed — litellm's dep tree in uv.lock contains no authlib). Bedrock/LiteLLM routing is completely unaffected.

🟡 authlib is not a direct dependency

pyproject.toml does not list authlib — it comes in transitively via fastmcp>=3.2.0. Bumping only uv.lock is valid with uv, but it means the upgrade is not anchored to a pyproject.toml constraint. If anyone runs uv lock --upgrade-package fastmcp it could revert this.

🟡 CVE not independently verifiable from this context

CVE-2026-27962 ("JWK Header Injection") is plausible for authlib, but I cannot confirm whether the fix lands in 1.6.9, 1.7.0, or both. The authlib changelog and GitHub advisory database should be checked before merging.

🟢 Merge safety vs current main

The branch is clean on top of main (1 commit ahead, no conflicts). The single changed file is uv.lock. Merge itself is low-risk mechanically.

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Recommendation

Hold for manual verification before merging. Specifically:

1. Confirm CVE-2026-27962 in NVD / GitHub Advisory Database and identify the actual patched version.
2. Decide if 1.7.0 is the right target or if a 1.6.x patch release exists that fixes the CVE without pulling in joserfc.
3. If upgrading to 1.7.0: Consider explicitly adding authlib>=1.7.0 to pyproject.toml so the constraint is visible and durable, rather than relying on a lock-only bump of a transitive dep.
4. Vet joserfc 1.6.4 as a new supply-chain addition.

If the CVE and version are confirmed correct, the change itself is minimal and safe to merge — the LiteLLM/Bedrock stack is completely isolated from this dependency.