GHSA-j93g-rp6m-j32m

Source

https://github.com/advisories/GHSA-j93g-rp6m-j32m

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-j93g-rp6m-j32m/GHSA-j93g-rp6m-j32m.json

JSON Data

https://api.test.osv.dev/v1/vulns/GHSA-j93g-rp6m-j32m

Aliases

Published

2026-06-11T17:10:21Z

Modified

2026-06-25T23:11:45Z

Severity

8.8 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

Arc: Unauthenticated access to Go debug pprof endpoints leaks runtime state and enables CPU-burn DoS

Details

Summary

Arc registers Go's net/http/pprof handlers at /debug/pprof/* via app.Use(pprof.New()) in internal/api/server.go, and /debug/pprof is added to PublicPrefixes in cmd/arc/main.go. The auth middleware short-circuits before the token check on prefix match, so the endpoints are reachable without any authentication.

Impact

Any network-reachable caller (no token required) can:

Fetch /debug/pprof/heap — leaks in-memory state: live SQL strings, decoded msgpack records, decompressed request bodies, cached *TokenInfo (the auth cache keys on SHA-256 of the plaintext token at auth.go:543).
Fetch /debug/pprof/goroutine?debug=2 — leaks call stacks, identifying internal code paths.
Fetch /debug/pprof/profile?seconds=N — pins a CPU core for arbitrary duration. Trivial DoS amplification (one short HTTP request → minutes of server CPU).
Fetch /debug/pprof/trace — long-duration execution trace, similar DoS profile.

No authentication, no rate limiting, no resource bound on the seconds parameter.

Patches

https://github.com/Basekick-Labs/arc/releases/tag/v26.06.1

Planned mitigation:

Gate pprof registration behind an env var (ARC_DEBUG_PPROF=1) that defaults to off.
When enabled, bind pprof to a separate localhost-only listener (127.0.0.1:6060 via dedicated net/http server) so it's never reachable from the public API port.
Remove /debug/pprof from PublicPrefixes.
Fix the HasPrefix bug where "/debug/pprofX" matches "/debug/pprof".

Workarounds

Block /debug/pprof* at a reverse proxy / load balancer in front of Arc.
Restrict Arc's API port to known-trusted networks via firewall rules.
Patch the running build: comment out app.Use(pprof.New()) in internal/api/server.go and rebuild.

Credits

Reported by Alex Manson (@NeuroWinter, https://neurowinter.com/) on 2026-05-19.

Database specific

{
    "cwe_ids": [
        "CWE-200",
        "CWE-306",
        "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-11T17:10:21Z",
    "nvd_published_at": null,
    "severity": "HIGH"
}

References

Affected packages

Go / github.com/basekick-labs/arc

Package

Name: github.com/basekick-labs/arc; View open source insights on deps.dev
Purl: pkg:golang/github.com/basekick-labs/arc

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

0.0.0-20260520170331-32a4091fb949

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-j93g-rp6m-j32m/GHSA-j93g-rp6m-j32m.json"