CVE-2026-88880

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 before 44.11.3 fails to validate Link header destinations when following GitLab server pagination, allowing malicious servers to redirect credential-bearing requests. Attackers controlling a compromised GitLab server can specify a Link header pointing to attacker-controlled infrastructure to exfiltrate authentication credentials.

CVSS v3
8.6
EG Score
8.6(high)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

September 10, 2026

Last Modified

September 18, 2026

Advisory Details (2)

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

Renovate before 44.11.3 Credential Exfiltration via Link Header | Advisories | VulnCheck

https://www.vulncheck.com/advisories/renovate-before-44.11.3-credential-exfiltration-via-link-header
github Patch Available

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

https://github.com/renovatebot/renovate/security/advisories/GHSA-9hmg-9h89-jhmx

Vendor Advisories for CVE-2026-88880(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 30× in last 7d / 47× 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 20:27 UTCEG score recompute
  2. 2026-09-20 20:27 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 08:01 UTCGHSA enrichment
  5. 2026-09-19 19:26 UTCEG score recompute
  6. 2026-09-19 19:26 UTCGHSA enrichment
  7. 2026-09-19 07:00 UTCEG score recompute
  8. 2026-09-19 07:00 UTCGHSA enrichment
  9. 2026-09-18 19:28 UTCEPSS rescore
  10. 2026-09-18 18:33 UTCEG score recompute
  11. 2026-09-18 18:33 UTCGHSA enrichment
  12. 2026-09-18 17:29 UTCEG score recompute
  13. 2026-09-18 17:29 UTCGHSA enrichment
  14. 2026-09-18 09:25 UTCGHSA enrichment
  15. 2026-09-17 21:00 UTCEG score recompute
  16. 2026-09-17 21:00 UTCGHSA enrichment
  17. 2026-09-17 19:32 UTCEPSS rescore
  18. 2026-09-17 08:34 UTCGHSA enrichment
  19. 2026-09-16 20:08 UTCEG score recompute
  20. 2026-09-16 20:08 UTCGHSA enrichment
  21. 2026-09-16 14:09 UTCEPSS rescore
  22. 2026-09-16 07:43 UTCEG score recompute
  23. 2026-09-16 07:43 UTCGHSA enrichment
  24. 2026-09-16 05:15 UTCEPSS rescore
  25. 2026-09-15 19:14 UTCGHSA enrichment
Show 22 more
  1. 2026-09-15 06:48 UTCEG score recompute
  2. 2026-09-15 06:48 UTCGHSA enrichment
  3. 2026-09-15 03:12 UTCEPSS rescore
  4. 2026-09-14 18:22 UTCGHSA enrichment
  5. 2026-09-14 05:56 UTCGHSA enrichment
  6. 2026-09-13 17:31 UTCEG score recompute
  7. 2026-09-13 17:31 UTCGHSA enrichment
  8. 2026-09-13 16:48 UTCEPSS rescore
  9. 2026-09-13 05:05 UTCGHSA enrichment
  10. 2026-09-12 16:40 UTCEG score recompute
  11. 2026-09-12 16:40 UTCGHSA enrichment
  12. 2026-09-12 15:02 UTCEPSS rescore
  13. 2026-09-12 04:14 UTCGHSA enrichment
  14. 2026-09-11 15:49 UTCEG score recompute
  15. 2026-09-11 15:49 UTCGHSA enrichment
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-11 03:23 UTCEG score recompute
  19. 2026-09-11 03:23 UTCGHSA enrichment
  20. 2026-09-10 14:19 UTCEG score recompute
  21. 2026-09-10 13:20 UTCEG score recompute
  22. 2026-09-10 13:20 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-88880?
CVE-2026-88880 is a high vulnerability published on September 10, 2026. Renovate before 44.11.3 fails to validate Link header destinations when following GitLab server pagination, allowing malicious servers to redirect credential-bearing requests. Attackers controlling a compromised GitLab server can specify a Link header pointing to attacker-controlled infrastructure…
When was CVE-2026-88880 disclosed?
CVE-2026-88880 was first published in the National Vulnerability Database on September 10, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-88880 actively exploited?
CVE-2026-88880 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 70.5% of all scored CVEs.
What is the CVSS score of CVE-2026-88880?
CVE-2026-88880 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-88880?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-88880, 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

Explore the affected products and dependency analysis for CVE-2026-88880

Explore →

Is Your Infrastructure Affected by CVE-2026-88880?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs