{"data":{"id":"4721faf3-75ac-46cb-ac31-441584550cba","title":"CVE-2026-26129: Improper neutralization of special elements in M365 Copilot allows an unauthorized attacker to disclose information over","summary":"CVE-2026-26129 is a vulnerability in Microsoft 365 Copilot where improper neutralization of special elements (failure to safely handle certain characters or code) allows an unauthorized attacker to disclose information over a network. The vulnerability has a CVSS score (a 0-10 rating of how severe a vulnerability is) of 4.0, indicating moderate severity.","solution":"N/A -- no mitigation discussed in source.","labels":["security"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-26129","publishedAt":"2026-05-07T22:16:33.607Z","cveId":"CVE-2026-26129","cweIds":["CWE-138"],"cvssScore":"7.5","cvssSeverity":"high","severity":"high","attackType":["pii_leakage"],"issueType":"vulnerability","affectedPackages":null,"affectedVendors":["Microsoft"],"affectedVendorsRaw":["Microsoft M365 Copilot"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","attackVector":"network","attackComplexity":"low","privilegesRequired":"none","userInteraction":"none","exploitMaturity":"unknown","epssScore":0,"patchAvailable":null,"disclosureDate":"2026-05-07T22:16:33.607Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["confidentiality"],"aiComponentTargeted":"api","llmSpecific":true,"classifierConfidence":0.85,"researchCategory":null,"atlasIds":null}}