{"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…","summary":"CVE-2026-26129 is a vulnerability in M365 Copilot, classified under CWE-138 (Improper Neutralization of Special Elements). An unauthorized attacker can exploit it over a network to disclose information. NVD had not yet provided an assessment at publication, and the record was published and last modified on 05/07/2026 with Microsoft Corporation as the source.","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":["other"],"issueType":"vulnerability","affectedPackages":null,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":["Microsoft"],"affectedVendorsRaw":["M365 Copilot"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":"M365 Copilot improper neutralization enables information disclosure","headlinePromptVersion":"h1","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":0.01135,"epssCheckedAt":"2026-11-10T12:15:57.354Z","kevDateAdded":null,"advisoryAliases":["GHSA-hpvr-rjcg-4q53"],"affectedPackagesSource":null,"affectedPackagesCheckedAt":"2026-11-10T12:16:17.071Z","patchAvailable":null,"disclosureDate":"2026-05-07T22:16:33.607Z","fixReleasedAt":null,"daysToFix":null,"fixCheckedAt":null,"capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["confidentiality"],"aiComponentTargeted":"plugin","llmSpecific":true,"classifierConfidence":0.9,"researchCategory":null,"atlasIds":null,"fixes":[]}}