Auth bypass in Projeto-Siga Siga
CVE-2026-86274
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.007 (54.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003
Affected products
- Projeto-Siga Siga — versions 11.0.2.0, 11.0.2.1, 11.0.2.10
Weakness classification (CWE)
References
- vuldb.com/vuln/399435 (technical-description, vdb-entry)
- vuldb.com/vuln/399435/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-86274 (third-party-advisory)
- vuldb.com/submit/904871 (third-party-advisory)
- github.com/projeto-siga/siga/issues/2493 (issue-tracking, exploit)
- github.com/projeto-siga/siga/ (product)
Frequently asked questions
- What is CVE-2026-86274?
- CVE-2026-86274 is a medium-severity vulnerability in Projeto-Siga Siga, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-09-07.
- How severe is CVE-2026-86274?
- Medium severity. CVSS v3 base score is 5.3 out of 10.