CVE-2026-97370

A flaw was found in Junrar. The RAR virtual machine RarVM fails to properly enforce execution limits when handling jump instructions that target addresses beyond the program boundaries. A remote attacker could provide a specially crafted RAR archive to force the extraction process into an infinit...

Junrar: RarVM VM_JMP maxOpCount bypass causes infinite CPU loop during RAR4 extraction

Summary Junrar's RAR virtual machine can be forced into a deterministic infinite loop while extracting a crafted RAR4 archive. The RarVM.ExecuteCode loop is intended to be bounded by maxOpCount, but jump instructions can bypass this limit when setIP is called with a target instruction pointer...

GHSA-H9H9-2RMF-RVHP Junrar: RarVM VM_JMP maxOpCount bypass causes infinite CPU loop during RAR4 extraction

Summary Junrar's RAR virtual machine can be forced into a deterministic infinite loop while extracting a crafted RAR4 archive. The RarVM.ExecuteCode loop is intended to be bounded by maxOpCount, but jump instructions can bypass this limit when setIP is called with a target instruction pointer...

Infinite loop

Overview com.github.junrar:junrar is a rar decompression library in plain java. Affected versions of this package are vulnerable to Infinite loop through the RarVM.ExecuteCode process. An attacker can cause the extraction thread to enter an infinite loop and exhaust CPU resources by providing a...

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 VMJMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP function returns success...

CVE-2026-97370 Junrar: RarVM VM_JMP maxOpCount bypass causes infinite CPU loop during RAR4 extraction

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 VMJMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP function returns success...

EUVD-2026-102251

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 VMJMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP function returns success...

ai.driftkit:driftkit-context-engineering-spring-ai-starter (>=0.6.0, <=0.9.2), ai.driftkit:driftkit-context-engineering-spring-boot-starter (>=0.5.0, <=0.9.2) +1079 more potentially affected by CVE-2026-97370 via com.github.junrar:junrar (>=0.7, <=7.6.0)

com.github.junrar:junrar MAVEN version =0.7, =0.6.0, =0.5.0, =0.7.0, =0.7.0, =0.5.0, =0.8.3, =0.8.3, =0.8.3, =0.5.0, =0.5.0, =0.9.2 - ai.mattmann.mnemosyne:cas-crawler 1.11.0 - ai.mattmann.mnemosyne:cas-filemgr 1.11.0 - ai.mattmann.mnemosyne:cas-pge 1.11.0 - ai.mattmann.mnemosyne:cas-product 1.11...

CVE-2026-97370

The Junrar open-source Java RAR archive library is vulnerable to a CPU exhaustion flaw in versions prior to 7.6.1 . The root cause is located in RarVM.ExecuteCode within src/main/java/com/github/junrar/unpack/vm/RarVM.java, where a VM_JMP instruction can repeatedly execute if its target is greate...

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 VMJMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP function returns success...

CVE-2026-97370 Junrar: RarVM VM_JMP maxOpCount bypass causes infinite CPU loop during RAR4 extraction

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 VMJMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP function returns success...

CVE-2026-97370 Junrar: RarVM VM_JMP maxOpCount bypass causes infinite CPU loop during RAR4 extraction

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 VMJMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP function returns success...

CVE-2026-97370: Loop with Unreachable Exit Condition

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 VMJMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP function returns success...

PT-2026-115111

Name of the Vulnerable Software and Affected Versions Junrar versions prior to 7.6.1 Description An issue exists in the RAR virtual machine where a crafted RAR4 archive can force the extraction thread into a deterministic infinite CPU loop. This occurs because the RarVM.ExecuteCode function in...

Junrar Resource Management Error Vulnerability

Versions of Junrar prior to 7.6.1 contained a resource management vulnerability. This vulnerability stems from the RarVMExecuteCode feature, which allows for the repeated execution of VMJMP instructions where the target is greater than or equal to the program’s codeSize. The setIP function return...

Denial-Of-Service (DoS)

Junrar is vulnerable to denial of service DoS. The vulnerability is due to improper handling of invalid VMJMP instruction targets, which allows an attacker to craft a malicious RAR4 archive that causes infinite CPU consumption and exhausts archive-processing worker capacity during extraction...

GHSA-89M4-43J5-VHHX Junrar: LocalFolderExtractor mkdir escape allows directory creation outside extraction root

Summary LocalFolderExtractor validates only the final canonical file path before extraction. However, makeFile creates intermediate directories one path segment at a time without checking whether each created directory remains inside the destination folder. A malicious RAR entry can make the fina...

Junrar: LocalFolderExtractor mkdir escape allows directory creation outside extraction root

Summary LocalFolderExtractor validates only the final canonical file path before extraction. However, makeFile creates intermediate directories one path segment at a time without checking whether each created directory remains inside the destination folder. A malicious RAR entry can make the fina...

EUVD-2026-81011

Junrar: LocalFolderExtractor mkdir escape allows directory creation outside extraction root...

Directory Traversal

Overview com.github.junrar:junrar is a rar decompression library in plain java. Affected versions of this package are vulnerable to Directory Traversal due to unchecked intermediate directory creation in LocalFolderExtractor’s makeFile path handling. An attacker can create directories outside the...