8.3

CVE-2026-71206: shiori - JWT CheckToken Never Re-Validates Account State, Allowing Stale-Privilege Access After Deletion or Demotion

Deferred
Published 05-08-2026Last modified 10-08-2026

Vulnerability summary

CVE-2026-71206 is a high (CVSS 8.3) vulnerability in go-shiori shiori. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 31.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.2, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.3/10
010
High · v3.1 (NVD)
EPSS score
0.37%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 05-08-2026
    PublishedVulnerability first disclosed.
  2. 10-08-2026
    Last modifiedVulnerability information updated.

Description

Shiori's CheckToken function (internal/domains/auth.go) validates only the JWT's HMAC signature and returns the embedded claims.Account object unmodified, never re-fetching the account from the database. No session store or token-revocation mechanism exists in the codebase.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.37%

Chance of exploitation in the next 30 days

Percentile

31%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.37% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Go-shiori1 product
  • shioriAll versions (No fix recorded)

1 vendor · 1 product

References

1 links