CVE-2026-88882

HIGHPre-NVD 8.68.6—
EchelonGraph scoreHIGH confidence

Score 8.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-10. a secondary CVSS source baseline 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.6Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Renovate is a dependency update automation tool. In versions before 44.11.2 (and Mend Renovate CE/EE images and charts before 15.4.0, and mend-renovate-enterprise-edition helm chart before 10.4.0), when listing new package versions from a NuGet registry Renovate follows pagination URLs supplied by the registry in the HTTP Link header without verifying that the target has the same origin as the configured registry. Registry credentials are attached to the request for the 'next' page, so a malicious or compromised NuGet registry can return a Link header pointing at an attacker-controlled server and cause Renovate to send the registry credentials to that server. Exploitation requires the remote registry to be malicious or compromised; such a registry would normally already have received the credentials on the initial request, so the issue primarily allows the credentials to be delivered to an additional, attacker-chosen host. The fix restricts pagination to the same origin; the previous behaviour can be re-enabled with the RENOVATE_X_NUGET_PAGINATION_ALLOW_CROSS_ORIGIN option.

CVSS v3
8.6
EG Score
8.6(high)
EG Risk
43(Track)
EG Risk 43/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity86% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

September 10, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Sep 10, 2026
Patch available. Sources: github.
generic

Renovate before 44.11.2 Credential Exfiltration via Link Header | Advisories | VulnCheck

https://www.vulncheck.com/advisories/renovate-before-44.11.2-credential-exfiltration-via-link-header
github Patch Available

Malicious Nuget registries could send a malicious `Link` header to allow exflitrating credentials · Advisory · renovatebot/renovate · GitHub

https://github.com/renovatebot/renovate/security/advisories/GHSA-rh7w-ccch-gh49

Vendor Advisories for CVE-2026-88882(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 27× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-20 22:29 UTCEG score recompute
  2. 2026-09-20 22:29 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 10:15 UTCGHSA enrichment
  5. 2026-09-19 22:00 UTCEG score recompute
  6. 2026-09-19 22:00 UTCGHSA enrichment
  7. 2026-09-19 09:44 UTCGHSA enrichment
  8. 2026-09-18 21:19 UTCEG score recompute
  9. 2026-09-18 21:19 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 08:05 UTCGHSA enrichment
  12. 2026-09-17 19:51 UTCEG score recompute
  13. 2026-09-17 19:50 UTCGHSA enrichment
  14. 2026-09-17 19:32 UTCEPSS rescore
  15. 2026-09-17 07:00 UTCGHSA enrichment
  16. 2026-09-16 18:45 UTCEG score recompute
  17. 2026-09-16 18:45 UTCGHSA enrichment
  18. 2026-09-16 14:09 UTCEPSS rescore
  19. 2026-09-16 06:30 UTCEG score recompute
  20. 2026-09-16 06:30 UTCGHSA enrichment
  21. 2026-09-16 05:15 UTCEPSS rescore
  22. 2026-09-15 18:16 UTCGHSA enrichment
  23. 2026-09-15 05:34 UTCEG score recompute
  24. 2026-09-15 05:34 UTCGHSA enrichment
  25. 2026-09-15 03:12 UTCEPSS rescore
Show 19 more
  1. 2026-09-14 17:19 UTCGHSA enrichment
  2. 2026-09-14 05:04 UTCGHSA enrichment
  3. 2026-09-13 16:50 UTCEG score recompute
  4. 2026-09-13 16:50 UTCGHSA enrichment
  5. 2026-09-13 16:48 UTCEPSS rescore
  6. 2026-09-13 04:36 UTCGHSA enrichment
  7. 2026-09-12 16:21 UTCEG score recompute
  8. 2026-09-12 16:21 UTCGHSA enrichment
  9. 2026-09-12 15:02 UTCEPSS rescore
  10. 2026-09-12 04:06 UTCGHSA enrichment
  11. 2026-09-11 15:51 UTCEG score recompute
  12. 2026-09-11 15:51 UTCGHSA enrichment
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 14:53 UTCEPSS rescore
  15. 2026-09-11 03:36 UTCEG score recompute
  16. 2026-09-11 03:36 UTCGHSA enrichment
  17. 2026-09-10 14:19 UTCEG score recompute
  18. 2026-09-10 13:20 UTCEG score recompute
  19. 2026-09-10 13:20 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-88882?
CVE-2026-88882 is a high vulnerability published on September 10, 2026. Renovate is a dependency update automation tool. In versions before 44.11.2 (and Mend Renovate CE/EE images and charts before 15.4.0, and mend-renovate-enterprise-edition helm chart before 10.4.0), when listing new package versions from a NuGet registry Renovate follows pagination URLs supplied by…
When was CVE-2026-88882 disclosed?
CVE-2026-88882 was first published in the National Vulnerability Database on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-88882 actively exploited?
CVE-2026-88882 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 76.6% of all scored CVEs.
What is the CVSS score of CVE-2026-88882?
CVE-2026-88882 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-88882?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-88882, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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