EIP-2026-103687

PRE-CVE

unrar 5.40 - 'VMSF_DELTA' Filter Arbitrary Memory Write

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-103687. PoCs published by Google Security Research.

AI-analyzed exploit summary The exploit leverages an integer overflow in the VMSF_DELTA filter of unrar, allowing out-of-bounds writes via crafted RAR files. The provided base64-encoded RAR file triggers the vulnerability in versions prior to 5.5.5.

Description

unrar 5.40 - 'VMSF_DELTA' Filter Arbitrary Memory Write

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · textdosmultiple
https://www.exploit-db.com/exploits/42245

The exploit leverages an integer overflow in the VMSF_DELTA filter of unrar, allowing out-of-bounds writes via crafted RAR files. The provided base64-encoded RAR file triggers the vulnerability in versions prior to 5.5.5.

Classification
Working Poc 100%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: unrar 5.40 and prior
No auth needed
Prerequisites: A vulnerable version of unrar or software using unrar code
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026