CSRF in Thiagopena Djangosige
CVE-2026-64821
djangoSIGE through 1.10 (commit a6fe7e8) contains a cross-site request forgery vulnerability that allows unauthenticated attackers to cancel sales or purchase orders on behalf of authenticated users by exploiting order-cancellation logic implemented inside HTTP GET method handlers in CancelarOrcamentoVendaView, CancelarPedidoVendaView, CancelarOrcamentoCompraView, and CancelarPedidoCompraView. Attackers can lure an authenticated victim with change_orcamentovenda or equivalent permissions to a page containing a cross-origin reference such as an img tag pointing to the cancellation endpoint, bypassing CSRF token validation entirely since Django's CsrfViewMiddleware only enforces CSRF checks on unsafe HTTP methods.
Vulnerability class: CSRF (Cross-Site Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (12.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.0% 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: 0.002 · change: 0.000
Affected products
- Thiagopena Djangosige — versions 0
Weakness classification (CWE)
References
- github.com/americooo/pentest-writeups/tree/main/djangoSIGE-CVE-2026-64821-64822 (technical-description, exploit)
- github.com/thiagopena/djangoSIGE/pull/163 (issue-tracking)
- www.vulncheck.com/advisories/djangosige-csrf-via-get-based-order-cancellation-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-64821?
- CVE-2026-64821 is a medium-severity vulnerability in Thiagopena Djangosige, classified under Cross-Site Request Forgery (CSRF). CVSS score: 4.3/10. Published 2026-07-21.
- How severe is CVE-2026-64821?
- Medium severity. CVSS v3 base score is 4.3 out of 10.