CVE-2026-34743

| EUVD-2026-18505 LOW
2026-04-02 GitHub_M
1.7
CVSS 4.0

CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
Apr 02, 2026 - 19:01 vuln.today
EUVD ID Assigned
Apr 02, 2026 - 19:01 euvd
EUVD-2026-18505
CVE Published
Apr 02, 2026 - 18:36 nvd
LOW 1.7

Tags

Buffer Overflow Heap Overflow

Description

XZ Utils provide a general-purpose data-compression library plus command-line tools. Prior to version 5.8.3, if lzma_index_decoder() was used to decode an Index that contained no Records, the resulting lzma_index was left in a state where where a subsequent lzma_index_append() would allocate too little memory, and a buffer overflow would occur. This issue has been patched in version 5.8.3.

Analysis

Buffer overflow in XZ Utils lzma_index_decoder() allows memory corruption when processing Index records with no data entries prior to version 5.8.3. Unauthenticated remote attackers can trigger a heap overflow via crafted compressed data, potentially causing denial of service or memory corruption. …

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Priority Score

9
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +8
POC: 0

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CVE-2026-34743 vulnerability details – vuln.today
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