CVE-2026-14191

EIP tracks 2 public exploits for CVE-2026-14191. PoCs published by HermesNA-1, HORKimhab.

AI-analyzed exploit summary This repository contains an auto-generated stub module for CVE-2026-14191, an out-of-bounds heap write vulnerability in WinRAR and UnRAR's RAR5 recovery-volume (.rev) parser. The code includes placeholder methods (`check` and `run`) but lacks actual exploit implementation or technical details about the vulnerability mechanics.

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.