{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-14191",
        "assignerOrgId": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
        "state": "PUBLISHED",
        "assignerShortName": "securin",
        "dateReserved": "2026-06-30T08:32:07.249Z",
        "datePublished": "2026-07-01T02:41:39.316Z",
        "dateUpdated": "2026-07-09T04:47:54.319Z"
    },
    "containers": {
        "cna": {
            "title": "WinRAR / UnRAR RAR5 recovery-volume (.rev) out-of-bounds heap write in RecVolumes5::ReadHeader",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "An out-of-bounds heap write exists in the RAR5 recovery-volume (.rev) parser in WinRAR and UnRAR (RecVolumes5::ReadHeader in recvol5.cpp). The RecItems vector is sized only when the first .rev file in a set is processed; subsequent .rev files supply an independent RecNum value that is validated against that file's own TotalCount field but never against the actual size of RecItems. A crafted set of two or more .rev files can therefore write an attacker-controlled 32-bit value (the header's RevCRC field) to RecItems[RecNum] at an attacker-controlled offset up to 65534 * sizeof(RecVolItem) bytes past the allocation, corrupting adjacent heap objects. Triggering requires the victim to run a recovery/test operation on an attacker-supplied .rev set (for example 'unrar t x.part1.rev', WinRAR 'Repair archive', or auto-recovery when extracting a volume set with a missing .rar part). This is the RAR5-path sibling of CVE-2023-40477 (which was fixed in the RAR3 path only in WinRAR 6.23). Fixed in WinRAR / RAR 7.23."
                }
            ],
            "affected": [
                {
                    "vendor": "RARLAB",
                    "product": "WinRAR",
                    "platforms": [
                        "Windows"
                    ],
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "7.23",
                            "status": "affected",
                            "versionType": "custom"
                        }
                    ]
                },
                {
                    "vendor": "RARLAB",
                    "product": "RAR",
                    "platforms": [
                        "Windows",
                        "Linux",
                        "macOS"
                    ],
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "7.23",
                            "status": "affected",
                            "versionType": "custom"
                        }
                    ]
                },
                {
                    "vendor": "RARLAB",
                    "product": "UnRAR",
                    "platforms": [
                        "Windows",
                        "Linux",
                        "macOS"
                    ],
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "0",
                            "lessThanOrEqual": "7.21",
                            "status": "affected",
                            "versionType": "custom"
                        }
                    ]
                },
                {
                    "vendor": "RARLAB",
                    "product": "UnRAR.dll",
                    "platforms": [
                        "Windows"
                    ],
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "7.23",
                            "status": "affected",
                            "versionType": "custom"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "CWE-787 Out-of-bounds Write",
                            "cweId": "CWE-787",
                            "type": "CWE"
                        },
                        {
                            "lang": "en",
                            "description": "CWE-129 Improper Validation of Array Index",
                            "cweId": "CWE-129",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    }
                }
            ],
            "references": [
                {
                    "url": "https://www.rarlab.com/download.htm",
                    "name": "WinRAR / RAR 7.23 download (fixed release, 2026-06-30)",
                    "tags": [
                        "patch",
                        "vendor-advisory"
                    ]
                },
                {
                    "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-40477",
                    "name": "CVE-2023-40477 - Sibling RAR3-path vulnerability fixed in WinRAR 6.23",
                    "tags": [
                        "related"
                    ]
                },
                {
                    "url": "https://www.securin.io/zero-days/cve-2026-14191-winrar-unrar-rar5-recovery-volume-rev-out-of-bounds-heap-write-in-recvolumes5-readheader"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Arjun Basnet from Securin",
                    "type": "finder"
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-100",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "Overflow Buffers - a controlled out-of-bounds heap write with attacker-controlled offset and attacker-influenced value, giving a memory-corruption primitive that can be used to crash the process (verified DoS) and, per the reporter's assessment mirroring the RAR3 sibling CVE-2023-40477, can plausibly be leveraged toward remote code execution in the context of the current user. Code execution was not demonstrated by the reporter."
                        }
                    ]
                }
            ],
            "timeline": [
                {
                    "lang": "en",
                    "time": "2026-06-03T02:08:00.000Z",
                    "value": "Vulnerability reported to RARLAB (Eugene Roshal) by Securin"
                },
                {
                    "lang": "en",
                    "time": "2026-06-03T20:01:00.000Z",
                    "value": "RARLAB confirmed the findings after independent source review"
                },
                {
                    "lang": "en",
                    "time": "2026-06-30T07:51:00.000Z",
                    "value": "WinRAR / RAR 7.23 released with .rev processing fix"
                },
                {
                    "lang": "en",
                    "time": "2026-06-30T00:00:00.000Z",
                    "value": "CVE-2026-14191 reserved by Securin CNA"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "providerMetadata": {
                "orgId": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
                "shortName": "securin",
                "dateUpdated": "2026-07-09T04:47:54.319Z"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-01T13:07:23.906784Z",
                                "id": "CVE-2026-14191",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-07-01T13:07:52.685Z"
                }
            }
        ]
    }
}