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CVE-2026-118762critical9.3

Monkeytype: fork PR can execute code with elevated GITHUB_TOKEN

Impact

Monkeytype versions prior to 26.43.0 have a vulnerability where a forked pull request can execute code with elevated GITHUB_TOKEN permissions. An external contributor can run arbitrary code and access the token. The issue affects the repository CI workflow.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

monkeytypegame · GitHub_M

monkeytype

1 range
GitHub_M version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

< 26.43.0

unaffected

unknown

Other versions: unknown

Original source description

Monkeytype is a minimalistic and customizable typing test. Prior to 26.43.0, the .github/workflows/fix-formatting.yml workflow runs on pull_request_target with repository write permissions, checks out a fork pull request, installs dependencies from the fork's package.json, and invokes the fork-controlled oxfmt binary. Because actions/checkout persists the elevated GITHUB_TOKEN in Git configuration until after untrusted code executes, an external contributor whose pull request receives the format label can run arbitrary code, read or exfiltrate the token, and push repository content or modify pull requests and issues. The issue affects the repository CI workflow, not the Monkeytype application or user data. This issue is fixed in version 26.43.0.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-118762

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-829 ↗

CWE-829: Inclusion of Functionality from Untrusted Control Sphere

GitHub_M

Related →
Contributing organizations · 1
GitHub_M

Assigning organization

2026-10-29

What changed

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Large field values are marked as truncated previews. Original source snapshots remain retained.

References

3 sources
github.com/monkeytypegame/monkeytype/security/advisories/GHSA-47v3-j88w-92f8
Security advisoryGitHub_M
github.com/monkeytypegame/monkeytype/commit/592ce1becb9b6824badc14a803bcd9268cbea382
PatchGitHub_M
github.com/monkeytypegame/monkeytype/releases/tag/v26.43.0
Release notesGitHub_M