CVE-2026-63770

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-20. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

Glance through 0.8.5 contains an IP address spoofing vulnerability in the authentication handler that allows unauthenticated attackers to bypass brute-force lockout protections by supplying arbitrary values in the X-Forwarded-For request header when the server proxied option is enabled. Attackers can manipulate the leftmost value of the X-Forwarded-For header to make each login attempt appear to originate from a distinct IP address, preventing the per-IP failed-login counter from reaching the lockout threshold and enabling unlimited credential guessing against the authentication endpoint.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 23, 2026

Advisory Details (3)

Auto-updated Jul 20, 2026
No patch confirmed yet. Sources: github_pr.
generic

Glance 0.8.5 IP Spoofing Authentication Brute-Force Protection Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/glance-ip-spoofing-authentication-brute-force-protection-bypass
github_pr

fix: use last IP from X-Forwarded-For to prevent rate limit bypass

Upstream fix in progress (PR #1033 · glanceapp/glance, state=open)

https://github.com/glanceapp/glance/pull/1033
generic

Authentication Rate Limit Bypass via X-Forwarded-For Spoofing · Issue #1031 · glanceapp/glance · GitHub

https://github.com/glanceapp/glance/issues/1031

Vendor Advisories for CVE-2026-63770(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 23× in last 7d / 23× 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. 2026-07-27 03:33 UTCGHSA enrichment
  2. 2026-07-26 15:53 UTCEG score recompute
  3. 2026-07-26 15:53 UTCGHSA enrichment
  4. 2026-07-26 14:54 UTCEPSS rescore
  5. 2026-07-26 14:54 UTCEPSS rescore
  6. 2026-07-26 04:27 UTCEG score recompute
  7. 2026-07-26 04:27 UTCGHSA enrichment
  8. 2026-07-25 14:18 UTCEPSS rescore
  9. 2026-07-25 14:18 UTCEPSS rescore
  10. 2026-07-24 14:18 UTCEPSS rescore
  11. 2026-07-24 14:18 UTCEPSS rescore
  12. 2026-07-23 14:18 UTCEPSS rescore
  13. 2026-07-23 14:18 UTCEPSS rescore
  14. 2026-07-23 03:22 UTCEG score recompute
  15. 2026-07-22 23:30 UTCEG score recompute
  16. 2026-07-22 23:30 UTCGHSA enrichment
  17. 2026-07-22 14:08 UTCEPSS rescore
  18. 2026-07-22 14:08 UTCEPSS rescore
  19. 2026-07-21 15:25 UTCEPSS rescore
  20. 2026-07-21 15:25 UTCEPSS rescore
  21. 2026-07-20 20:42 UTCEG score recompute
  22. 2026-07-20 19:13 UTCEG score recompute
  23. 2026-07-20 19:12 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-63770?
CVE-2026-63770 is a high vulnerability published on July 20, 2026. Glance through 0.8.5 contains an IP address spoofing vulnerability in the authentication handler that allows unauthenticated attackers to bypass brute-force lockout protections by supplying arbitrary values in the X-Forwarded-For request header when the server proxied option is enabled. Attackers…
When was CVE-2026-63770 disclosed?
CVE-2026-63770 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63770 actively exploited?
CVE-2026-63770 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 90.2% of all scored CVEs.
What is the CVSS score of CVE-2026-63770?
CVE-2026-63770 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-63770?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63770, 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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