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VulnerabilityPublished Updated

CVE-2026-88883: renovatebot renovate · Sensitive Data in Logs

Affects renovatebot renovateSource CVE Database V5

0

Not known to be exploited · CVSS 8.3 High : upgrade to 44.14.4 soon.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 4.0 base score
8.3High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 32% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 44.14.4, 15.4.0, 10.4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade renovate to 44.14.4; renovate-ce and renovate-ee-server and renovate-ee-worker and mend-renovate-ce to 15.4.0; mend-renovate-enterprise-edition to 10.4.0.

Affected software

ProductAffectedFixed in
renovatebotrenovateAffected
  • <44.14.4
Fixed in
  • 44.14.4
mendrenovate-ceAffected
  • <15.4.0
Fixed in
  • 15.4.0
mendrenovate-ee-serverAffected
  • <15.4.0
Fixed in
  • 15.4.0
mendrenovate-ee-workerAffected
  • <15.4.0
Fixed in
  • 15.4.0
mendmend-renovate-ceAffected
  • <15.4.0
Fixed in
  • 15.4.0
mendmend-renovate-enterprise-editionAffected
  • <10.4.0
Fixed in
  • 10.4.0

AI-suggested

A fix is available in Renovate version 44.14.4, Mend Renovate CE/EE images 15.4.0, and mend-renovate-enterprise-edition Helm chart 10.4.0, which redacts the private key wherever it appears in logs. Users should upgrade to these fixed versions to fully remediate the issue. As a workaround, supplying the TLS private key via the documented secrets configuration avoids the key being logged in cleartext. No other mitigation actions are indicated by the vendor advisory.

Description

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

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