CVE-2026-44590

CRITICALNVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under NVD CVSS v3. EPSS exploit probability: 1.1%, top 37% 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
Elevated
9.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Sherlock hunts down social media accounts by username across social networks. Prior to 0.16.1, the GitHub Actions workflow validate_modified_targets.yml is vulnerable to command injection via the pull_request_target trigger. Any GitHub user can execute arbitrary commands on the CI runner and exfiltrate the GITHUB_TOKEN by opening a pull request. No approval, review, or merge is required. This vulnerability is fixed in 0.16.1.

CVSS v3
9.3
EG Score
9.3(medium)
EPSS
63.0%
KEV
Not listed

Published

May 27, 2026

Last Modified

May 29, 2026

Advisory Details (1)

Auto-updated May 28, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Command Injection via pull_request_target in validate_modified_targets.yml · Advisory · sherlock-project/sherlock · GitHub

https://github.com/sherlock-project/sherlock/security/advisories/GHSA-v6wr-ccr4-x8g9

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 69× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 183 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 02:00 UTCEPSS rescore
  3. 2026-07-13 22:30 UTCEPSS rescore
  4. 2026-07-12 05:46 UTCEPSS rescore
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  9. 2026-07-08 15:16 UTCEPSS rescore
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  15. 2026-07-02 23:48 UTCEG score recompute
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  20. 2026-06-30 23:22 UTCEPSS rescore
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  1. 2026-06-28 18:51 UTCEG score recompute
  2. 2026-06-28 14:07 UTCEPSS rescore
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  6. 2026-06-28 04:56 UTCEPSS rescore
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  8. 2026-06-27 19:52 UTCEG score recompute
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  19. 2026-06-25 13:49 UTCEPSS rescore
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  21. 2026-06-25 13:18 UTCEG score recompute
  22. 2026-06-25 08:53 UTCEG score recompute
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  24. 2026-06-24 14:05 UTCEPSS rescore
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  26. 2026-06-22 14:25 UTCEPSS rescore
  27. 2026-06-22 14:25 UTCEPSS rescore
  28. 2026-06-21 14:56 UTCEPSS rescore
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  30. 2026-06-21 01:59 UTCEPSS rescore
  31. 2026-06-19 19:25 UTCEPSS rescore
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  34. 2026-06-18 03:38 UTCEG score recompute
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  37. 2026-06-17 17:53 UTCEPSS rescore
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  43. 2026-06-16 17:52 UTCEPSS rescore
  44. 2026-06-16 15:54 UTCEG score recompute
  45. 2026-06-16 11:27 UTCEG score recompute
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  48. 2026-06-15 22:14 UTCEG score recompute
  49. 2026-06-15 17:49 UTCEPSS rescore
  50. 2026-06-15 13:19 UTCEG score recompute
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  59. 2026-06-13 23:00 UTCEPSS rescore
  60. 2026-06-13 19:40 UTCEG score recompute
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  65. 2026-06-12 23:12 UTCEPSS rescore
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  67. 2026-06-12 19:52 UTCEG score recompute
  68. 2026-06-12 15:28 UTCEG score recompute
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  70. 2026-06-12 06:34 UTCEG score recompute
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  72. 2026-06-11 21:46 UTCEG score recompute
  73. 2026-06-11 17:22 UTCEG score recompute
  74. 2026-06-11 14:00 UTCEPSS rescore
  75. 2026-06-11 12:58 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-44590?
CVE-2026-44590 is a critical vulnerability published on May 27, 2026. Sherlock hunts down social media accounts by username across social networks. Prior to 0.16.1, the GitHub Actions workflow validatemodifiedtargets.yml is vulnerable to command injection via the pullrequesttarget trigger. Any GitHub user can execute arbitrary commands on the CI runner and exfiltrate…
When was CVE-2026-44590 disclosed?
CVE-2026-44590 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on May 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44590 actively exploited?
CVE-2026-44590 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 63.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-44590?
CVE-2026-44590 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-44590?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44590, 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

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