How severe is GHSA-8pmp-678w-c8xx?

No CVSS score has been assigned to GHSA-8pmp-678w-c8xx yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-8pmp-678w-c8xx?

GHSA-8pmp-678w-c8xx affects the following packages: github.com/sigstore/gitsign (Go). Ecosystems affected: Go.

How do I fix GHSA-8pmp-678w-c8xx?

Update github.com/sigstore/gitsign to 0.11.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8pmp-678w-c8xx is resolved across your whole dependency graph.

How do I detect GHSA-8pmp-678w-c8xx in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/sigstore/gitsign, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-8pmp-678w-c8xx if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is GHSA-8pmp-678w-c8xx actively exploited in the wild?

No public exploit code has been indexed for GHSA-8pmp-678w-c8xx yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-8pmp-678w-c8xx?

GHSA-8pmp-678w-c8xx has an EPSS (Exploit Prediction Scoring System) score of 0.1%, placing it in the 2th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-8pmp-678w-c8xx?

GHSA-8pmp-678w-c8xx is classified as CWE-706 (CWE-706). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-8pmp-678w-c8xx published, and has it been updated?

GHSA-8pmp-678w-c8xx was published on November 5, 2024 and was last updated on November 6, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹 Go

Not in CISA KEV

gitsign may use incorrect Rekor entries during verificationGHSA-8pmp-678w-c8xx

GHSA-8pmp-678w-c8xx is a CWE-706 vulnerability in github.com/sigstore/gitsign. A fix is available for github.com/sigstore/gitsign — see the affected versions and patch details below.

Also known asCVE-2024-51746GO-2024-3252

Published

Nov 5, 2024

Updated

Nov 6, 2024

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for GHSA-8pmp-678w-c8xx.

EPSS Exploitation Probability

via FIRST.org ↗

0.1%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs2th percentile — riskier than 2% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

🐹github.com/sigstore/gitsign

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Summary

gitsign may select the wrong Rekor entry to use during online verification when multiple entries are returned by the log.

Details

gitsign uses Rekor's search API to fetch entries that apply to a signature being verified. The parameters used for the search are the public key and the payload. The search API returns entries that match either condition rather than both. When gitsign's credential cache is used, there can be multiple entries that use the same ephemeral keypair / signing certificate. As gitsign assumes both conditions are matched by Rekor, there is no additional validation that the entry's hash matches the payload being verified, meaning that the wrong entry can be used to successfully pass verification.

PoC

Enable the credential cache and create commit signatures using the cached signing certificate. gitsign verify or git log --show-signature will demonstrate the use of the wrong entry index for the corresponding commit. Note that this depends on the order of matching entries in the response from the Rekor search API, so it may take a few attempts to trigger this.

Impact

Minimal. While gitsign does not match the payload against the entry, it does ensure that the certificate matches. This would need to be exploited during the certificate validity window (10 minutes) by the key holder.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/sigstore/gitsign`	all versions	0.11.0`go get github.com/sigstore/gitsign@v0.11.0`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/sigstore/gitsign, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/sigstore/gitsign to 0.11.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8pmp-678w-c8xx is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### Summary gitsign may select the wrong Rekor entry to use during online verification when multiple entries are returned by the log. ### Details gitsign uses Rekor's search API to fetch entries that apply to a signature being verified. The parameters used for the search are the public key and the payload. The search API returns entries that match _either_ condition rather than _both_. When gitsign's credential cache is used, there can be multiple entries that use the same ephemeral keypair / signing certificate. As gitsign assumes both conditions are matched by Rekor, there is no additiona

O3 Security · Impact-Aware SCA

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