CVE-2026-28512 json
Pocket ID: OAuth redirect_uri validation bypass via userinfo/host confusion
published 8mo ago modified 4mo ago also GHSA-9h33-g3ww-mqff , GO-2026-4653 , EUVD-2026-10406
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 15%
- public exploits
- 0
- none known
Summary
Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to your services. From 2.0.0 to before 2.4.0, a flaw in callback URL validation allowed crafted redirect_uri values containing URL userinfo (@) to bypass legitimate callback pattern checks. If an attacker can trick a user into opening a malicious authorization link, the authorization code may be redirected to an attacker-controlled host. This vulnerability is fixed in 2.4.0.
Patch / fix
- go github.com/pocket-id/pocket-id/backend 0.0.0-20260228130835-3a339e33191c
- 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-2026-28512 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
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7mo ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/pocket-id/pocket-id/backend | <0.0.0-20260228130835-3a339e33191c |
0.0.0-20260228130835-3a339e33191c |
Affected products
- pocket-id pocket-id
Classification
- Weakness
-
- CWE-601 URL Redirection to Untrusted Site
References
-
github.com
/pocket-id/pocket-id/commit/3a339e33191c31b68bf57db907f800d9de5ffbc8
web, patch
-
github.com
/pocket-id/pocket-id/security/advisories/GHSA-9h33-g3ww-mqff
web, mitigation, patch, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-28512
advisory
-
github.com
/pocket-id/pocket-id
package
Sources
- CVE List CVE-2026-28512
- GitHub Advisory GHSA-9h33-g3ww-mqff
- NVD CVE-2026-28512
- OSV GO-2026-4653
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.