Vulnerability · Published Sep 7, 2026 · Assigned by VulDB
CVE-2026-86274projeto-siga Authentication Flow ExAutenticacaoController.java ExAutenticacaoController.autenticar authorization
Medium 5.3
In plain English
A medium-severity missing authorization in siga from projeto-siga. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities).
Official description
A security vulnerability has been detected in projeto-siga siga up to 11.0.2.10/11.0.2.13/11.1.1. This affects the function ExAutenticacaoController.autenticar of the file sigaex/src/main/java/br/gov/jfrj/siga/vraptor/ExAutenticacaoController.java of the component Authentication Flow. Such manipulation of the argument cod/jwt leads to missing authorization. The attack may be launched remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| projeto-siga | siga | 11.0.2.011.0.2.111.0.2.211.0.2.311.0.2.411.0.2.511.0.2.611.0.2.7 |
Weakness: CWE-862, CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
References
- VDB-399435 | projeto-siga Authentication Flow ExAutenticacaoController.java ExAutenticacaoController.autenticar authorization vdb-entry, technical-description
- VDB-399435 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-86274 | CVE Analysis and Report third-party-advisory
- Submit #904871 | projeto-siga siga 11.0.2.10 through 11.1.1 authorization bypass third-party-advisory
- https://github.com/projeto-siga/siga/issues/2493 exploit, issue-tracking
- https://github.com/projeto-siga/siga/ product