Is CVE-2026-8295 actively exploited?

No active exploitation of CVE-2026-8295 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-8295 be exploited remotely?

Yes. CVE-2026-8295 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-8295?

CVE-2026-8295 has a CVSS score of 6.9 (MEDIUM).

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MEDIUM

CVE-2026-8295

CWE-190Published: May 14, 2026· Updated: May 19, 2026

6.9

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.0th

Official Description

An integer overflow vulnerability in the simdjson document-builder API allows incorrect buffer size calculations in "string_builder::escape_and_append()" when processing very large input strings on platforms with limited "size_t" width (e.g., 32-bit builds). The overflow can cause insufficient buffer allocation, leading to out-of-bounds memory reads in SIMD routines and potentially resulting in information disclosure, memory corruption, or malformed JSON output.

This vulnerability has been fixed in 4.6.4 release

NVD Source

Technical Analysis

CVE-2026-8295 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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