CVE-2026-62673Network attack vector

Unauthenticated file disclosure via case-variant requests

Published Aug 19, 2026 · Updated Aug 19, 2026

Access control bypass in Grav before 2.0.4 allows remote attackers to read sensitive files via case-variant HTTP requests. The shipped .htaccess and webserver-configs/htaccess.txt deny rules compare protected paths and extensions case-sensitively because they omit Apache's [NC] flag, so alternate capitalization can evade RewriteRule blocking on case-insensitive filesystems. Exposure requires Apache with Grav's shipped rules on a case-insensitive filesystem such as Windows, macOS, or some Docker-mounted volumes, and it enables direct retrieval of files under user/accounts, user/config, and similar protected locations, including password hashes and security settings.

CVSS severity8.2
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access control bypass in Grav before 2.0.4 allows remote attackers to read sensitive files via case-variant HTTP requests. The shipped .htaccess and webserver-configs/htaccess.txt deny rules compare protected paths and extensions case-sensitively because they omit Apache's [NC] flag, so alternate capitalization can evade RewriteRule blocking on case-insensitive filesystems. Exposure requires Apache with Grav's shipped rules on a case-insensitive filesystem such as Windows, macOS, or some Docker-mounted volumes, and it enables direct retrieval of files under user/accounts, user/config, and similar protected locations, including password hashes and security settings.

The record

CVE
CVE-2026-62673
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
Grav
Product
Grav
Classifications
CWE-178, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=< 2.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Grav · Gravversion=< 2.0.4

Published CVSS scores

8.2GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-178Improper Handling of Case Sensitivity
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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