CVE-2026-43983Public exploitNetwork attack vector

Persistent OIDC access via stale refresh tokens

Published May 12, 2026 · Updated May 12, 2026

Improper authorization in Pocket ID before 2.6.0 allows remote authenticated users to retain OIDC access with stale refresh tokens. createTokenFromRefreshToken verifies token integrity, expiry, and client ownership but omits checks for account disabling, revoked client authorization, and current group eligibility. A valid refresh token and client credentials from earlier authorized access are required; successful refreshes issue new access and identity tokens containing user claims.

CVSS severity8.5
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Pocket ID before 2.6.0 allows remote authenticated users to retain OIDC access with stale refresh tokens. createTokenFromRefreshToken verifies token integrity, expiry, and client ownership but omits checks for account disabling, revoked client authorization, and current group eligibility. A valid refresh token and client credentials from earlier authorized access are required; successful refreshes issue new access and identity tokens containing user claims.

The record

CVE
CVE-2026-43983
Published
May 12, 2026
Updated
May 12, 2026
Vendor
Pocket ID
Product
Pocket ID
Classifications
CWE-613, CWE-285, T1550.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=< 2.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Pocket ID · Pocket IDversion=< 2.6.0

Published CVSS scores

7.1Pocket IDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
8.5GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-613Insufficient Session Expiration
CWE-285Improper Authorization
T1550.001Use Alternate Authentication Material: Application Access Token

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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