CVE-2026-63770

HIGHPre-NVD 7.57.5
EchelonGraph scoreLOW confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: secondary
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 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(low)
EPSS
9.8%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 21, 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 7× in last 7d / 7× 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. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:25 UTCEPSS rescore
  4. 2026-07-21 15:25 UTCEPSS rescore
  5. 2026-07-20 20:42 UTCEG score recompute
  6. 2026-07-20 19:13 UTCEG score recompute
  7. 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 21, 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 9.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-63770?
CVE-2026-63770 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
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

Explore the affected products and dependency analysis for CVE-2026-63770

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