CVE-2026-8080
MEDIUMMISP core - Stored XSS in MISP template (old engine) element attribute type
Title source: cnaExploitation Summary
EIP tracks 1 public exploit for CVE-2026-8080. PoCs published by George0Papasotiriou.
AI-analyzed exploit summary This repository demonstrates a DKIM signature verification bypass vulnerability (CVE-2026-8080) caused by improper header canonicalization. The flawed verifier includes extra headers not listed in the 'h=' tag during hash computation, allowing attackers to inject headers that alter email behavior while maintaining a valid signature.
Description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in misp allows Stored XSS. This issue affects MISP before 2.5.37. A stored cross-site scripting vulnerability exists in the template element attribute handling logic. The application accepted arbitrary values for the TemplateElementAttribute type and category fields without validating them against the known MISP attribute type and category definitions. An attacker with permission to create or modify template element attributes could store a crafted type value. This affects the old templating (not more accessible in 2.5.37) engine from MISP which will be removed in 2.5.38
Exploits (1)
This repository demonstrates a DKIM signature verification bypass vulnerability (CVE-2026-8080) caused by improper header canonicalization. The flawed verifier includes extra headers not listed in the 'h=' tag during hash computation, allowing attackers to inject headers that alter email behavior while maintaining a valid signature.
References (1)
Scores
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N