CVE-2026-63728

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreHIGH confidence

Score 6.3 from GitHub Security Advisory (severity: HIGH) published 2026-07-21. a secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
6.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.3Exploit: NoneExposed: 0

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

Gitleaks prior to 8.30.1 contains a template injection vulnerability that allows attackers who can supply or influence report templates to read arbitrary environment variables and exfiltrate sensitive data by leveraging non-hermetic Sprig template functions. Attackers can craft malicious report templates using the env, expandenv, and getHostByName functions to extract credentials, tokens, and API keys from the host process and exfiltrate them through DNS queries, including secrets discovered during the scan itself.

CVSS v3
6.3
EG Score
6.3(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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 computed
Severity63% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
4.2%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 22, 2026

Advisory Details (4)

Auto-updated Jul 22, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

Gitleaks: Abusing Sprig Template Functions for Secret Exfiltration | Fatih's Blog

https://fatihhcelik.github.io/posts/gitleaks-abusing-sprig-for-exfiltration/#the-fix
generic

Gitleaks Secret Exfiltration via Non-Hermetic Sprig Template Functions in Report Template Feature | Advisories | VulnCheck

https://www.vulncheck.com/advisories/gitleaks-secret-exfiltration-via-non-hermetic-sprig-template-functions-in-report-template-feature
github_commit

commit 83d9cd684c87 (gitleaks/gitleaks)

Fix landed in gitleaks/gitleaks commit 83d9cd684c87 — awaiting tagged release

https://github.com/gitleaks/gitleaks/commit/83d9cd684c87d95d656c1458ef04895a7f1cbd8e
generic

GitHub - gitleaks/gitleaks: Find secrets with Gitleaks 🔑 · GitHub

https://github.com/gitleaks/gitleaks

Vendor Advisories for CVE-2026-63728(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 11× 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.

  1. 2026-07-23 03:22 UTCEG score recompute
  2. 2026-07-22 23:26 UTCEG score recompute
  3. 2026-07-22 23:26 UTCGHSA enrichment
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-22 14:08 UTCEPSS rescore
  6. 2026-07-21 15:25 UTCEPSS rescore
  7. 2026-07-21 15:25 UTCEPSS rescore
  8. 2026-07-21 01:49 UTCEG score recompute
  9. 2026-07-21 01:49 UTCGHSA enrichment
  10. 2026-07-20 23:48 UTCEG score recompute
  11. 2026-07-20 23:47 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-63728?
CVE-2026-63728 is a medium vulnerability published on July 20, 2026. Gitleaks prior to 8.30.1 contains a template injection vulnerability that allows attackers who can supply or influence report templates to read arbitrary environment variables and exfiltrate sensitive data by leveraging non-hermetic Sprig template functions. Attackers can craft malicious report…
When was CVE-2026-63728 disclosed?
CVE-2026-63728 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63728 actively exploited?
CVE-2026-63728 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-63728?
CVE-2026-63728 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-63728?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63728, 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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