CVE-2026-97370

Junrar is an open source Java RAR archive library. Prior to 7.6.1, RarVM.ExecuteCode in src/main/java/com/github/junrar/unpack/vm/RarVM.java can repeatedly execute a VM_JMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP() function returns success without changing the instruction pointer or decrementing maxOpCount, and the jump handler continues before loop-end accounting, leaving both values unchanged. A crafted RAR4 archive can therefore keep an extraction thread in an infinite CPU loop and exhaust archive-processing worker capacity. The RAR virtual machine does not expose native process execution, so the supported impact is availability loss rather than code execution. This issue is fixed in version 7.6.1.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 34% of CVEs (scores of 2026-10-25)

CWE

CWE-835

Published

2026-10-15

Modified

2026-10-16

Record from

the NVD, synced 2026-10-19

Packages (OSV)

References

• https://github.com/junrar/junrar/commit/687a09c42f46066447faa9179ee11314ad6d9afb
• https://github.com/junrar/junrar/releases/tag/v7.6.1
• https://github.com/junrar/junrar/security/advisories/GHSA-h9h9-2rmf-rvhp

Check your stackJSON