SourceHut Registration Bypass When Disabled (CVE-2026-121728)
A logic bug introduced in 2021 allows registration even when disabled in SourceHut versions 0.56.11-0.88.9 if SMTP is configured.
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CVE-2026-121728
Authorization bypass in SourceHut meta.sr.ht before 0.89.0
- CVSS 4.0
- 6.9 medium
- EPSS
- —
- Published
- ·
- Modified
AI analysisSummaries by Vani AI
SourceHut meta.sr.ht lets unauthenticated remote attackers create accounts even when public registration is disabled. A request that reaches the registration step invokes an unchecked GraphQL RegisterAccount mutation. Impact is limited to unauthorized account creation. Instances running 0.56.11 before 0.89.0 are affected.
What to do: Upgrade SourceHut meta.sr.ht to 0.89.0.
| Product | Affected | Fixed in |
|---|---|---|
| SourceHut meta.sr.ht | 0.56.11 before 0.89.0 | 0.89.0 |
Estimated exposure
No basis for an estimate.
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description · NVD
SourceHut meta.sr.ht 0.56.11 before 0.89.0 contains an authorization bypass vulnerability that allows unauthenticated attackers to register accounts when public registration is disabled. Attackers can obtain a CSRF token from /login and POST credentials to /register/step2, which invokes the unchecked GraphQL RegisterAccount mutation to create accounts.
- Weakness
- CWE-862
- Vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X