CVE-2026-8295
Last modified
CVE-2026-8295 is a medium-severity vulnerability rated 6.9/10 on the CVSS scale. 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. EPSS estimates a 0.28% chance of exploitation in the next 30 days.
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
Metrics
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
Weakness Enumeration
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-8295?
How severe is CVE-2026-8295?
How do I fix CVE-2026-8295?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-8288A vulnerability was determined in Open5GS up to 2.7.7. This …6.5
- CVE-2026-8289A vulnerability was identified in Open5GS up to 2.7.7. This …6.5
- CVE-2026-8290A security flaw has been discovered in Open5GS up to 2.7.7. …6.5
- CVE-2026-8291A weakness has been identified in Open5GS up to 2.7.7. Impac…6.5
- CVE-2026-8292A security vulnerability has been detected in Open5GS up to …6.5
- CVE-2026-8293The Really Simple Security WordPress plugin before 9.5.10.1…7.5
- CVE-2026-8296In affected versions of Octopus Server with certain access l…5.6
- CVE-2026-8297Improper neutralization of special elements used in an SQL c…9.8
- CVE-2026-8305A vulnerability was detected in OpenClaw up to 2026.1.24. Th…9.8
- CVE-2026-8306Improper neutralization of input during web page generation …6.1
- CVE-2026-8307Improper neutralization of special elements used in an SQL c…9.8
- CVE-2026-8308Improper neutralization of input during web page generation …6.1
Are you affected by CVE-2026-8295?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST