{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-87864", "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9", "state": "PUBLISHED", "assignerShortName": "curl", "dateReserved": "2026-09-09T13:17:39.832Z", "datePublished": "2026-10-20T20:13:13.359Z", "dateUpdated": "2026-10-20T20:13:13.359Z" }, "containers": { "cna": { "title": "IMAP APPEND plus CRLF conversion command injection", "descriptions": [ { "lang": "en", "value": "Enabling `CURLOPT_CRLF` causes curl to advertise the raw input byte count in\nthe `IMAP APPEND {N}` literal while transmitting line-ending expanded data.\nThe server reads only $N$ bytes for the payload, causing the remaining\noverflow bytes to be interpreted and executed as pipelined IMAP commands\nwithin the authenticated session." } ], "providerMetadata": { "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9", "shortName": "curl", "dateUpdated": "2026-10-20T20:13:13.359Z" }, "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "CWE-130 Improper Handling of Length Parameter Inconsistency" } ] } ], "affected": [ { "vendor": "curl", "product": "curl", "versions": [ { "version": "8.21.0", "status": "affected", "lessThanOrEqual": "8.21.0", "versionType": "semver" }, { "version": "8.20.0", "status": "affected", "lessThanOrEqual": "8.20.0", "versionType": "semver" }, { "version": "8.19.0", "status": "affected", "lessThanOrEqual": "8.19.0", "versionType": "semver" }, { "version": "8.18.0", "status": "affected", "lessThanOrEqual": "8.18.0", "versionType": "semver" }, { "version": "8.17.0", "status": "affected", "lessThanOrEqual": "8.17.0", "versionType": "semver" }, { "version": "8.16.0", "status": "affected", "lessThanOrEqual": "8.16.0", "versionType": "semver" }, { "version": "8.15.0", "status": "affected", "lessThanOrEqual": "8.15.0", "versionType": "semver" }, { "version": "8.14.1", "status": "affected", "lessThanOrEqual": "8.14.1", "versionType": "semver" }, { "version": "8.14.0", "status": "affected", "lessThanOrEqual": "8.14.0", "versionType": "semver" }, { "version": "8.13.0", "status": "affected", "lessThanOrEqual": "8.13.0", "versionType": "semver" }, { "version": "8.12.1", "status": "affected", "lessThanOrEqual": "8.12.1", "versionType": "semver" }, { "version": "8.12.0", "status": "affected", "lessThanOrEqual": "8.12.0", "versionType": "semver" }, { "version": "8.11.1", "status": "affected", "lessThanOrEqual": "8.11.1", "versionType": "semver" }, { "version": "8.11.0", "status": "affected", "lessThanOrEqual": "8.11.0", "versionType": "semver" }, { "version": "8.10.1", "status": "affected", "lessThanOrEqual": "8.10.1", "versionType": "semver" }, { "version": "8.10.0", "status": "affected", "lessThanOrEqual": "8.10.0", "versionType": "semver" }, { "version": "8.9.1", "status": "affected", "lessThanOrEqual": "8.9.1", "versionType": "semver" }, { "version": "8.9.0", "status": "affected", "lessThanOrEqual": "8.9.0", "versionType": "semver" }, { "version": "8.8.0", 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"lessThanOrEqual": "7.44.0", "versionType": "semver" }, { "version": "7.43.0", "status": "affected", "lessThanOrEqual": "7.43.0", "versionType": "semver" }, { "version": "7.42.1", "status": "affected", "lessThanOrEqual": "7.42.1", "versionType": "semver" }, { "version": "7.42.0", "status": "affected", "lessThanOrEqual": "7.42.0", "versionType": "semver" }, { "version": "7.41.0", "status": "affected", "lessThanOrEqual": "7.41.0", "versionType": "semver" }, { "version": "7.40.0", "status": "affected", "lessThanOrEqual": "7.40.0", "versionType": "semver" }, { "version": "7.39.0", "status": "affected", "lessThanOrEqual": "7.39.0", "versionType": "semver" }, { "version": "7.38.0", "status": "affected", "lessThanOrEqual": "7.38.0", "versionType": "semver" }, { "version": "7.37.1", "status": "affected", "lessThanOrEqual": "7.37.1", "versionType": "semver" }, { "version": "7.37.0", "status": "affected", "lessThanOrEqual": "7.37.0", "versionType": "semver" }, { "version": "7.36.0", "status": "affected", "lessThanOrEqual": "7.36.0", "versionType": "semver" }, { "version": "7.35.0", "status": "affected", "lessThanOrEqual": "7.35.0", "versionType": "semver" }, { "version": "7.34.0", "status": "affected", "lessThanOrEqual": "7.34.0", "versionType": "semver" }, { "version": "7.33.0", "status": "affected", "lessThanOrEqual": "7.33.0", "versionType": "semver" }, { "version": "7.32.0", "status": "affected", "lessThanOrEqual": "7.32.0", "versionType": "semver" }, { "version": "7.31.0", "status": "affected", "lessThanOrEqual": "7.31.0", "versionType": "semver" }, { "version": "7.30.0", "status": "affected", "lessThanOrEqual": "7.30.0", "versionType": "semver" } ], "defaultStatus": "unaffected" } ], "references": [ { "url": "https://curl.se/docs/CVE-2026-87864.json", "name": "json" }, { "url": "https://curl.se/docs/CVE-2026-87864.html", "name": "www" }, { "url": "https://hackerone.com/reports/3972403", "name": "issue" } ], "credits": [ { "lang": "en", "value": "Stanislav Fort (Aisle Research)", "type": "finder" }, { "lang": "en", "value": "Stefan Eissing", "type": "remediation developer" } ] } } }