CVE-2026-63728 gitleaks vulnerability
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.
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gitleaks should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- < 8.30.1
Fixed versions
- Apply the latest vendor-supported patched version.
How to fix it
CVE-2026-63728 affects gitleaks and involves sensitive-information exposure. Successful exploitation may expose credentials, keys, configuration, or other sensitive information. Prioritize internet-facing, privileged, automation, and production deployments. Upgrade Gitleaks to 8.30.1 or later and stop using report templates from untrusted sources.
- Inventory every deployment, device, package, plugin, container, build, and environment that uses gitleaks.
- Compare the installed version with the recorded affected range: < 8.30.1.
- Upgrade Gitleaks to 8.30.1 or later and stop using report templates from untrusted sources.
- Until patched, reduce public exposure, disable the affected workflow where practical, and allow access only from trusted users and systems.
- Review configuration, roles, tokens, network paths, and exposed endpoints connected to gitleaks; remove access that is not required.
- Review application, DNS, network, CI, and audit logs for unusual secret access, exports, or outbound transmission.
- If exploitation is suspected, isolate affected assets, preserve evidence, rotate exposed credentials or keys, restore trusted data, and rebuild compromised systems before returning them to service.
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Verify the fix
- Confirm every affected asset now runs the fixed vendor-supported release or has the documented mitigation for CVE-2026-63728 in place.
- Use a safe regression test to confirm the affected sensitive-information exposure path no longer produces the vulnerable behavior.
- Confirm temporary access controls, endpoint restrictions, network blocks, and least-privilege settings remain effective after the update.
- Review post-remediation logs and rerun Fixnx plus the relevant package, dependency, firmware, browser, or product-specific security check.
- Document affected assets, versions, changes, validation evidence, reviewed logs, and any credential rotation, cleanup, or replacement completed.
Related categories
Related security risks
More published guidance from the same primary category.
Trusted references
FAQ
What is affected by CVE-2026-63728?
gitleaks versions listed as affected should be reviewed: < 8.30.1.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.