RCE in Projeto-Siga Siga
CVE-2026-6990
A vulnerability was found in projeto-siga siga 11.0.3.18. The affected element is an unknown function of the file /sigawf/app/responsavel/novo. Performing a manipulation of the argument Nome/Descrição results in cross site scripting. The attack can be initiated remotely. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (27.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Projeto-Siga Siga — versions 11.0.3.18
Weakness classification (CWE)
References
- vuldb.com/vuln/359542 (technical-description, vdb-entry)
- vuldb.com/vuln/359542/cti (signature, permissions-required)
- vuldb.com/submit/796647 (third-party-advisory)
- github.com/projeto-siga/siga/issues/2491 (issue-tracking)
- github.com/ViniCastro2001/Security_Reports/tree/main/siga/Stored-XSS-Responsavel (exploit)
- github.com/projeto-siga/siga/ (product)
Frequently asked questions
- What is CVE-2026-6990?
- CVE-2026-6990 is a low-severity vulnerability in Projeto-Siga Siga, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2026-04-25.
- How severe is CVE-2026-6990?
- Low severity. CVSS v3 base score is 3.5 out of 10.