CVE-2026-63770Public exploitNetwork attack vector

Unauthenticated lockout bypass via spoofed forwarded address

Published Jul 20, 2026 · Updated Jul 20, 2026

IP address spoofing in glanceapp Glance 0.8.5 and earlier allows remote attackers to bypass per-IP login lockouts via X-Forwarded-For. With server.proxied enabled, addressOfRequest uses the client-controlled leftmost header value as the failedAuthAttempts map key. Each rotated value resets the apparent source counter, enabling unlimited password guesses against any account reachable through the login endpoint.

CVSS severity8.2
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IP address spoofing in glanceapp Glance 0.8.5 and earlier allows remote attackers to bypass per-IP login lockouts via X-Forwarded-For. With server.proxied enabled, addressOfRequest uses the client-controlled leftmost header value as the failedAuthAttempts map key. Each rotated value resets the apparent source counter, enabling unlimited password guesses against any account reachable through the login endpoint.

The record

CVE
CVE-2026-63770
Published
Jul 20, 2026
Updated
Jul 20, 2026
Vendor
OpenStack
Product
Glance
Classifications
CWE-348, T1110
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=0.8.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenStack · Glanceversion=0 <=0.8.5

Published CVSS scores

8.2VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-348Use of Less Trusted Source
T1110Brute Force

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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