CVE-2026-62386Public exploitNetwork attack vector

Administrative token disclosure via query-string authentication

Published Jul 17, 2026 · Updated Jul 17, 2026

Sensitive query-string exposure in the Grav API plugin before 1.0.0-rc.16 allows remote attackers to obtain JWT access tokens from recorded URLs. JwtAuthenticator::extractBearerToken accepts the token query parameter on every API route, causing credentials to enter access logs, Referer headers, browser history, and intermediary logs. Access to any such URL record exposes the token, whose API permissions can include reading data, creating administrators, changing settings, and deleting pages.

CVSS severity8.2
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive query-string exposure in the Grav API plugin before 1.0.0-rc.16 allows remote attackers to obtain JWT access tokens from recorded URLs. JwtAuthenticator::extractBearerToken accepts the token query parameter on every API route, causing credentials to enter access logs, Referer headers, browser history, and intermediary logs. Access to any such URL record exposes the token, whose API permissions can include reading data, creating administrators, changing settings, and deleting pages.

The record

CVE
CVE-2026-62386
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
Grav
Product
Grav
Classifications
CWE-598, T1552.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 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 <1.0.0-rc.16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Grav · Gravversion=0 <1.0.0-rc.16

Published CVSS scores

7.5GravCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.2National Vulnerability 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 exploitPublished

Weakness, pattern, technique

CWE-598Use of HTTP Request With Sensitive Query String
T1552.001Credentials In Files

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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