CVE-2026-32246 json
Tinyauth vulnerable to TOTP/2FA bypass via OIDC authorize endpoint
published 2026-03-12 7 mo ago modified 2026-06-17 4 mo ago also GHSA-3q28-qjrv-qr39 , GO-2026-4688 , EUVD-2026-11681
- 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
Tinyauth is an authentication and authorization server. Prior to 5.0.3, the OIDC authorization endpoint allows users with a TOTP-pending session (password verified, TOTP not yet completed) to obtain authorization codes. An attacker who knows a user's password but not their TOTP secret can obtain valid OIDC tokens, completely bypassing the second factor. This vulnerability is fixed in 5.0.3.
Patch / fix
- go github.com/steveiliop56/tinyauth 1.0.1-20260311144920-9eb2d33064b7
- 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
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/steveiliop56/tinyauth/security/advisories/GHSA-3q28-qjrv-qr39 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:L/I:H/A:N |
| NVD | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N |
| GitHub | 3.1 | 8.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/steveiliop56/tinyauth | <1.0.1-20260311144920-9eb2d33064b7 all versions |
1.0.1-20260311144920-9eb2d33064b7 |
Affected products
- steveiliop56 tinyauth
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
github.com
/steveiliop56/tinyauth/security/advisories/GHSA-3q28-qjrv-qr39
web, exploit, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-32246
advisory
-
github.com
/steveiliop56/tinyauth
package
-
github.com
/steveiliop56/tinyauth/releases/tag/v5.0.3
web
Sources
- CVE List CVE-2026-32246
- GitHub Advisory GHSA-3q28-qjrv-qr39
- NVD CVE-2026-32246
- OSV GO-2026-4688
Fencer Vulns 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.