CVE-2026-88883

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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 \u2014 for example in another configuration option or in a log message under a key other than httpsPrivateKey \u2014 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. 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{"bugzilla": {"description": "renovate: Renovate: Information disclosure of TLS private keys via incomplete log sanitization", "id": "2531423", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2531423"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-117", "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 \u2014 for example in another configuration option or in a log message under a key other than httpsPrivateKey \u2014 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.", "A flaw was found in Renovate, an automated dependency update tool. Due to incomplete log sanitization, Transport Layer Security (TLS) private keys used for Mutual TLS could be written to logs in cleartext. This occurs when these keys are configured in a specific way without utilizing the documented secrets configuration. An attacker with access to these logs could recover the private key, leading to sensitive information disclosure."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, ensure that TLS private keys for Mutual TLS in Renovate configurations are always supplied via the documented `secrets` mechanism. Avoid directly embedding private keys within the `hostRules[].httpsPrivateKey` field. Refer to Renovate's official documentation for proper `secrets` configuration to prevent cleartext logging of sensitive key material."}, "name": "CVE-2026-88883", "public_date": "2026-09-10T13:05:33Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-88883\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-88883\nhttps://github.com/renovatebot/renovate/security/advisories/GHSA-4hmw-qw74-vrhm\nhttps://www.vulncheck.com/advisories/renovate-before-44.14.4-tls-private-key-log-sanitisation"], "statement": "Moderate: This flaw in Renovate, as deployed in Red Hat Konflux, allows for information disclosure of TLS private keys. When Mutual TLS is configured using `hostRules[].httpsPrivateKey` without utilizing the `secrets` configuration, private keys are written in cleartext to Renovate's logs. This could enable an attacker with local log access to recover sensitive key material.", "threat_severity": "Moderate"}

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