CVE-2026-88883

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CVE-2026-88883

Summary: Renovate before 44.14.4 TLS Private Key Log Sanitisation

Details: Renovate is an automated dependency update tool. In versions before 44.14.4 (and Mend Renovate CE/EE images before 15.4.0 and the mend-renovate-enterprise-edition Helm chart before 10.4.0), log sanitisation for TLS private keys used for Mutual TLS was incomplete. While the value of hostRules[].httpsPrivateKey was redacted in the field itself, the same private key value was not redacted if it also appeared elsewhere — for example in another configuration option or in a log message under a key other than httpsPrivateKey — causing the full private key to be written to Renovate's logs in cleartext. This affects deployments that configure Mutual TLS through hostRules[].httpsPrivateKey without passing the value through the documented `secrets` configuration. Anyone able to read the resulting logs can recover the private key. The issue is fixed in Renovate 44.14.4, which redacts any value supplied as hostRules[].httpsPrivateKey wherever it appears in the logs; as a workaround, supply the key via the `secrets` configuration.

References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88883.json, https://github.com/renovatebot/renovate/security/advisories/GHSA-4hmw-qw74-vrhm, https://nvd.nist.gov/vuln/detail/CVE-2026-88883, https://www.vulncheck.com/advisories/renovate-before-44.14.4-tls-private-key-log-sanitisation