Rack's greedy multipart boundary parsing can cause parser differentials and WAF bypass.

Summary Rack::Multipart::Parser extracts the boundary parameter from multipart/form-data using a greedy regular expression. When a Content-Type header contains multiple boundary parameters, Rack selects the last one rather than the first. In deployments where an upstream proxy, WAF, or intermedia...

CVE-2026-31935

A flaw was found in Suricata. A remote attacker can exploit this vulnerability by sending a flood of crafted HTTP2 continuation frames. This can lead to memory exhaustion, causing the Suricata process to shut down, resulting in a Denial of Service DoS. Mitigation To mitigate this issue, consider...

CVE-2026-26961 Rack: Multipart Boundary Parsing Ambiguity allowing WAF Bypass

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Multipart::Parser extracts the boundary parameter from multipart/form-data using a greedy regular expression. When a Content-Type header contains multiple boundary parameters, Rack selects the last one...

CVE-2026-26961

Rack vulnerable component: Rack::Multipart::Parser extracts multipart boundary from Content-Type using a greedy regex, causing last-boundary selection when multiple boundaries exist. This can allow smuggling of multipart content past upstream validation. Affected versions are before 2.2.23, 3.1.2...

CVE-2026-26961 Rack: Multipart Boundary Parsing Ambiguity allowing WAF Bypass

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Multipart::Parser extracts the boundary parameter from multipart/form-data using a greedy regular expression. When a Content-Type header contains multiple boundary parameters, Rack selects the last one...

EUVD-2026-18328

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the remark parameter to /manage/password/web/. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18318

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the remark parameter to /manage/dnsmasq/localdomains/. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18320

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the REMARK parameter to /cgi-bin/openvpnclient.cgi. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18324

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the remark parameter to /manage/vpnauthentication/user/. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18326

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the newcertname parameter to /manage/ca/certificate/. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18314

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the domain parameter to /manage/smtpscan/domainrouting/. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18290

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the dscp parameter to /manage/qos/rules/. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18294

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the remark parameter to /cgi-bin/snat.cgi. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18304

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the remark parameter to /cgi-bin/xtaccess.cgi. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18284

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the remark parameter to /manage/dhcp/fixedleases/. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18316

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the ADDRESS BCC parameter to /cgi-bin/smtprouting.cgi. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18308

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the user parameter to /cgi-bin/proxyuser.cgi. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18286

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the remark user ham spam parameter to /cgi-bin/salearn.cgi. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18282

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the NAME parameter to /cgi-bin/uplinkeditor.cgi. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...

EUVD-2026-18312

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting XSS via the DOMAIN parameter to /cgi-bin/smtpdomains.cgi. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page...