StepSecurity's Harden-Runner provides network egress filtering and runtime security for GitHub-hosted and self-hosted runners. Versions of step-security/harden-runner prior to v2.10.2 contain multiple command injection weaknesses via environment variables that could potentially be exploited under specific conditions. However, due to the current execution order of pre-steps in GitHub Actions and the placement of harden-runner as the first step in a job, the likelihood of exploitation is low as the Harden-Runner action reads the environment variable during the pre-step stage. There are no known exploits at this time. Version 2.10.2 contains a patch.
CVE-2024-52587
HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 2.7%, top 16% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 8.8Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.8
- EG Score
- 8.8(medium)
- EG Risk
- 41(Track)EG Risk 41/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity88% × 45%Exploitation3% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 3%
- EPSS %ILE
- 86%
- KEV
- Not listed
Published
November 18, 2024
Last Modified
April 15, 2026
References (8)
- security-advisories@githubhttps://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L40-L44
- security-advisories@githubhttps://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L53
- security-advisories@githubhttps://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L57
- security-advisories@githubhttps://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/arc-runner.ts#L61
- security-advisories@githubhttps://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/setup.ts#L169
- security-advisories@githubhttps://github.com/step-security/harden-runner/blob/951b48540b429070694bc8abd82fd6901eb123ca/src/setup.ts#L229
- security-advisories@githubhttps://github.com/step-security/harden-runner/commit/0080882f6c36860b6ba35c610c98ce87d4e2f26f
- security-advisories@githubhttps://github.com/step-security/harden-runner/security/advisories/GHSA-g85v-wf27-67xc
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Frequently asked(5)
What is CVE-2024-52587?
CVE-2024-52587 is a high vulnerability published on November 18, 2024. StepSecurity's Harden-Runner provides network egress filtering and runtime security for GitHub-hosted and self-hosted runners. Versions of step-security/harden-runner prior to v2.10.2 contain multiple command injection weaknesses via environment variables that could potentially be exploited under…
When was CVE-2024-52587 disclosed?
CVE-2024-52587 was first published in the National Vulnerability Database on November 18, 2024, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-52587 actively exploited?
CVE-2024-52587 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 14.4% of all scored CVEs.
What is the CVSS score of CVE-2024-52587?
CVE-2024-52587 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2024-52587?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-52587, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2024-52587
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