CVE-2026-71206Network attack vector

Stale owner access via unrevalidated JWT claims

Published Aug 5, 2026 · Updated Aug 5, 2026

Insufficient session expiration in Shiori version 0 allows attackers with valid owner JWTs to retain elevated access. CheckToken in internal/domains/auth.go verifies only the HMAC signature and trusts the embedded claims.Account without consulting the database or a revocation store. Attackers holding an owner token retain owner-level access after account deletion or demotion until expiry, which reaches 30 days when persistent login is enabled.

CVSS severityUnavailable
Unscored
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient session expiration in Shiori version 0 allows attackers with valid owner JWTs to retain elevated access. CheckToken in internal/domains/auth.go verifies only the HMAC signature and trusts the embedded claims.Account without consulting the database or a revocation store. Attackers holding an owner token retain owner-level access after account deletion or demotion until expiry, which reaches 30 days when persistent login is enabled.

The record

CVE
CVE-2026-71206
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
go-shiori
Product
Shiori
Classifications
T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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?

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  1. Affected versionversion=0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

go-shiori · Shioriversion=0

Published CVSS scores

No CVSS assessment is available in this record.

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1078Valid Accounts

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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