CVE-2026-28513 json
Pocket ID: OIDC authorization code validation uses AND instead of OR, allowing cross-client token exchange
published 8mo ago modified 4mo ago also GHSA-qh6q-598w-w6m2 , GO-2026-4656 , EUVD-2026-10408
- cvss
- 8.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 23%
- public exploits
- 0
- none known
Summary
Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to your services. Prior to 2.4.0, the OIDC token endpoint rejects an authorization code only when both the client ID is wrong and the code is expired. This allows cross-client code exchange and expired code reuse. This vulnerability is fixed in 2.4.0.
Patch / fix
- go github.com/pocket-id/pocket-id/backend 0.0.0-20260307173642-b59e35cb59ae
- pocket-id pocket_id 2.4.0
- govulncheck-vulndb openSUSE Leap 15.6 0.0.20260317T205859-150000.1.152.1
suse advisories SUSE-SU-2026:1042-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
Is CVE-2026-28513 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7mo ago
Exploit prediction
0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/pocket-id/pocket-id/security/advisories/GHSA-qh6q-598w-w6m2 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N |
| NVD | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N |
| GitHub | 3.1 | 8.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/pocket-id/pocket-id/backend | <0.0.0-20260307173642-b59e35cb59ae |
0.0.0-20260307173642-b59e35cb59ae |
Affected products
- pocket-id pocket-id
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/pocket-id/pocket-id/security/advisories/GHSA-qh6q-598w-w6m2
exploit, web, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-28513
advisory
-
github.com
/pocket-id/pocket-id
package
Sources
- CVE List CVE-2026-28513
- GitHub Advisory GHSA-qh6q-598w-w6m2
- NVD CVE-2026-28513
- OSV GO-2026-4656
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.