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PatchSiren cyber security CVE debrief

CVE-2026-110867 renovatebot CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-10-14T22:52:55.043Z and has not been modified since then. This vulnerability in Renovate before 44.60.1 allows repositories to set restricted environment variables by placing env inside a shared preset, potentially leading to security risks in self-hosted instances. Defenders managing self-hosted Renovate instances, especially those using shared presets from externally sourced repositories, should assess exposure and verify the integrity of environment variables in child processes.

Vendor
renovatebot
Product
renovate
CVSS
CRITICAL 9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-14
Original CVE updated
2026-10-15
Advisory published
2026-10-14
Advisory updated
2026-10-15

Who should care

Defenders managing self-hosted Renovate instances, especially those using shared presets from externally sourced repositories, should assess exposure and verify the integrity of environment variables in child processes.

Why it matters

CVE-2026-110867 allows repositories to set restricted environment variables by placing env inside a shared preset, potentially leading to security risks in self-hosted instances. Defenders should prioritize verifying exposure and assessing the integrity of environment variables in child processes.

  • Verify exposure in self-hosted Renovate instances using shared presets from externally sourced repositories.
  • Assess the integrity of environment variables in child processes.
  • Update Renovate to version 44.60.1 or later to mitigate the vulnerability.
  • Review and restrict environment variables set in shared presets to prevent potential security risks.

Technical summary

The CVE-2026-110867 vulnerability in Renovate before 44.60.1 allows repositories to set restricted environment variables by placing env inside a shared preset. This could potentially lead to security risks in self-hosted instances, as attackers controlling an externally sourced preset can override variables like PATH, LD_PRELOAD, NODE_OPTIONS, or GIT_SSL_CAINFO in child processes. The vulnerability highlights the importance of verifying exposure in self-hosted Renovate instances, especially those using shared presets from externally sourced repositories, and assessing the integrity of environment variables in child processes.

Defensive priority

Defenders should prioritize verifying exposure in self-hosted Renovate instances, especially those using shared presets from externally sourced repositories, and assess the integrity of environment variables in child processes.

Recommended defensive actions

  • Verify exposure in self-hosted Renovate instances using shared presets from externally sourced repositories.
  • Assess the integrity of environment variables in child processes.
  • Update Renovate to version 44.60.1 or later.
  • Review and restrict environment variables set in shared presets to prevent potential security risks.
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
  • Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
  • Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Evidence notes

The CVE record and source item provide details on the allowlist bypass vulnerability in Renovate before 44.60.1. The vulnerability allows repositories to set restricted environment variables by placing env inside a shared preset, potentially leading to security risks in self-hosted instances.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-110867 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-110867

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-110867 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-110867

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Renovate before 44.60.1 allowedEnv Allowlist Bypass via Shared Preset

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/110xxx/CVE-2026-110867.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://github.com/renovatebot/renovate/security/advisories/GHSA-6873-xr44-22vm

    Supplemental source - vendor-advisory

  • Source reference

    Unverified legacy reference

    URL: https://www.vulncheck.com/advisories/renovate-before-44.60.1-allowedenv-allowlist-bypass-via-shared-preset

    Supplemental source - third-party-advisory

  • Source reference

    Unverified legacy reference

    URL: https://github.com/nodemailer/nodemailer/security/advisories/GHSA-4g23-2xm8-66gc

    Supplemental source - exploit

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.