[dependabot]

⚠️ Dependabot is rebasing this PR ⚠️

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---

Bumps undici from 8.11.2 to 8.12.3.

Release notes

Sourced from undici's releases.

v8.12.3

What's Changed

• ci: use Python 3.14 for the WPT server on macOS by @​mrityunjay-pandey in nodejs/undici#6029
• build(deps-dev): bump neostandard from 0.13.0 to 0.14.0 by @​dependabot[bot] in nodejs/undici#6006
• build(deps-dev): bump eslint from 9.39.4 to 10.12.0 by @​dependabot[bot] in nodejs/undici#5967
• docs: document the options of interceptors.cache() by @​qodelicious in nodejs/undici#6050
• fix(h2): replace a connection that stops responding after a stream timeout by @​mcollina in nodejs/undici#6052
• fix(pool): keep caller async context for queued requests by @​mcollina in nodejs/undici#5982

New Contributors

• @​qodelicious made their first contribution in nodejs/undici#6050

Full Changelog: nodejs/undici@v8.12.2...v8.12.3

v8.12.2

Security fixes

High severity

Denial of service via TLS 1.2 certificate-changing renegotiation

CVE-2026-87018 · GHSA-qrxm-fqhp-jwvm

A malicious or compromised HTTPS server could crash the Node.js process by initiating TLS 1.2 renegotiation and presenting a different, CA-trusted certificate whose hostname did not match the requested host. The resulting socket error reached an assertion in undici's HTTP/1.1 and HTTP/2 connection handling. This release handles post-connect certificate errors without terminating the process.

TLS certificate validation bypass through dropped Agent options

CVE-2026-109383 · GHSA-2m5v-pch6-74hx

Agent used a JSON-based clone for constructor options, which silently removed function-valued TLS options such as checkServerIdentity. Applications relying on custom certificate or public-key verification could therefore accept a certificate that the callback was intended to reject. This release preserves TLS options when creating per-origin dispatchers.

Cache poisoning and cross-user disclosure through cross-origin redirects

CVE-2026-109829 · GHSA-4w7w-5xrc-9h26

When an originless Agent combined redirect and shared-cache interceptors as compose(redirect(), cache()), a response from a cross-origin redirect could be stored under the original URL. This could allow persistent cache poisoning or disclosure of user-specific responses to later callers. This release verifies the response origin before caching and preserves redirect-hop cache-control policy.

Denial of service through excessive Content-Encoding values

CVE-2026-109869 · GHSA-xjj6-f33q-929c

A malicious HTTP server could crash the Node.js process by returning more than five content codings and closing the connection before sending the body. Although fetch() rejected the response, an error from an orphaned internal stream could remain unhandled. This release validates the content-encoding chain before creating the body stream and aborts oversized chains safely.

Medium severity

Denial of service through the decompress interceptor

CVE-2026-87029 · GHSA-55wc-3pg8-jfw6

... (truncated)

Commits

• ff9cc5e Bumped v8.12.3 (#6053)
• 0bbf614 fix(pool): keep caller async context for queued requests (#5982)
• aa1eef1 fix(h2): replace a connection that stops responding after a stream timeout (#...
• e34b872 docs: document the options of interceptors.cache() (#6050)
• e8f3423 build(deps-dev): bump eslint from 9.39.4 to 10.12.0 (#5967)
• b777e40 build(deps-dev): bump neostandard from 0.13.0 to 0.14.0 (#6006)
• 43700ff ci: use Python 3.14 for the WPT server on macOS (#6029)
• bb6cc0a Bumped v8.12.2 (#6021)
• b217373 fix(websocket): bound automatic PONG writes under backpressure
• 789ef26 fix(eventsource): bound retained SSE parser state
• Additional commits viewable in compare view

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[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

OpenSSF Scorecard

Package	Version	Score	Details
npm/undici	8.12.3	🟢 8.2	Details Check Score Reason Maintained 🟢 10 30 commit(s) and 2 issue activity found in the last 90 days -- score normalized to 10 Dependency-Update-Tool 🟢 10 update tool detected Security-Policy 🟢 10 security policy file detected Code-Review 🟢 8 Found 17/21 approved changesets -- score normalized to 8 Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Token-Permissions ⚠️ 0 detected GitHub workflow tokens with excessive permissions Binary-Artifacts 🟢 8 binaries present in source code CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Pinned-Dependencies 🟢 6 dependency not pinned by hash detected -- score normalized to 6 Vulnerabilities 🟢 8 2 existing vulnerabilities detected SAST 🟢 10 SAST tool is run on all commits Packaging 🟢 10 packaging workflow detected License 🟢 10 license file detected Signed-Releases ⚠️ -1 no releases found Fuzzing 🟢 10 project is fuzzed Branch-Protection ⚠️ -1 internal error: error during branchesHandler.setup: internal error: some github tokens can't read classic branch protection rules: https://github.com/ossf/scorecard-action/blob/main/docs/authentication/fine-grained-auth-token.md CI-Tests 🟢 10 26 out of 26 merged PRs checked by a CI test -- score normalized to 10 Contributors 🟢 10 project has 58 contributing companies or organizations

Scanned Files

• pnpm-lock.yaml

[SebastianLopezO]

Closing as already resolved on main in commit 2d08995 where pnpm-lock.yaml was refreshed with undici@8.12.3.

[dependabot]

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