CVE-2026-97370 Details
Description
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.
A denial-of-service vulnerability has been identified in Junrar, an open-source Java library for handling RAR archives. This issue affects versions through 7.6.0. The vulnerability arises in the RAR virtual machine's execution of jump instructions, which can be manipulated to create an infinite loop. When a crafted RAR4 archive is processed, the virtual machine can bypass execution limits and cause a thread to consume excessive CPU resources, blocking other tasks. This issue has been addressed in version 7.6.1.
Users can upgrade to Junrar version 7.6.1 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 15, 2026CISA-ADP
Assessed Oct 16, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/junrar/junrar/commit/687a09c42f46066447faa9179ee11314ad6d9afb | [email protected] | Source CodeVendor |
| https://github.com/junrar/junrar/releases/tag/v7.6.1 | [email protected] | Release NotesVendor |
| https://github.com/junrar/junrar/security/advisories/GHSA-h9h9-2rmf-rvhp | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-835 | Loop with Unreachable Exit Condition ('Infinite Loop') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Junrar | <= 7.6.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 16, 2026 | CVE Modified | CISA-ADP |
| Oct 15, 2026 | New CVE Received | [email protected] |