CVE-2026-88883 (GCVE-0-2026-88883)
Vulnerability from cvelistv5 – Published: 2026-09-10 13:05 – Updated: 2026-09-10 14:55
VLAI
EPSS
VEX
Title
Renovate before 44.14.4 TLS Private Key Log Sanitisation
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 14:18 UTC
CWE
- CWE-532 - Insertion of Sensitive Information into Log File
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/renovatebot/renovate/security/… | vendor-advisory |
| https://www.vulncheck.com/advisories/renovate-bef… | third-party-advisory |
Impacted products
3 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| renovatebot | renovate |
Affected:
0 , < 44.14.44
(semver)
Unaffected: 44.14.44 (semver) |
guessed | |
| renovatebot | renovate |
Affected:
0 , < 15.4.0
(semver)
Unaffected: 15.4.0 (semver) |
guessed | |
| renovatebot | renovate |
Affected:
0 , < 10.4.0
(semver)
Unaffected: 10.4.0 (semver) |
guessed |
Date Public
2026-08-27 00:00
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"id": "CVE-2026-88883",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-10T14:18:26.314591Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-09-10T14:17:16.997",
"references": [
{
"source": "disclosure@vulncheck.com",
"url": "https://github.com/renovatebot/renovate/security/advisories/GHSA-4hmw-qw74-vrhm"
},
{
"source": "disclosure@vulncheck.com",
"url": "https://www.vulncheck.com/advisories/renovate-before-44.14.4-tls-private-key-log-sanitisation"
}
],
"sourceIdentifier": "disclosure@vulncheck.com",
"vulnStatus": "Undergoing Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-532"
}
],
"source": "disclosure@vulncheck.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-09-18T06:54:31+00:00",
"cve": "CVE-2026-88883",
"id": "CVE-2026-88883",
"initial_release_date": "2026-09-10T13:05:33.976000+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "renovate: Renovate: Information disclosure of TLS private keys via incomplete log sanitization",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88883.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-88883",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
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"timestamp": "2026-09-10T14:18:26.314591Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-10T14:18:27.262Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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{
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"packageURL": "pkg:npm/renovate",
"product": "renovate",
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{
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{
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"status": "affected",
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},
{
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}
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},
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},
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]
},
{
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"vendor": "renovatebot",
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},
{
"status": "unaffected",
"version": "15.4.0",
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}
]
},
{
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"vendor": "renovatebot",
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},
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{
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}
]
},
{
"defaultStatus": "unaffected",
"product": "renovate",
"vendor": "renovatebot",
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},
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}
]
},
{
"defaultStatus": "unaffected",
"product": "renovate",
"vendor": "renovatebot",
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},
{
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"vendor": "renovatebot",
"versions": [
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}
]
},
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"vendor": "renovatebot",
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}
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],
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}
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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