Cyber Resilience

CVE-2026-32285

Jsonparser Project Jsonparser ≤ 1.1.2

Public PoC
Published
26 March 2026
Modified
10 August 2026
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0075 52th percentile
Risk Priority 59 floored blend · peak EPSS

Summary

CVE-2026-32285 is a high-severity Improper Validation of Array Index (CWE-129) vulnerability in Jsonparser Project Jsonparser. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 48% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2026-32285 is a vulnerability in the Delete function of the jsonparser library (github.com/buger/jsonparser) for Go. It stems from a failure to properly validate offsets when processing malformed JSON input, resulting in a negative slice index that triggers a runtime panic and enables a denial-of-service condition. The issue is classified under CWE-129 (Improper Validation of Array Index) and carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), highlighting its high availability impact.

Unauthenticated remote attackers can exploit this vulnerability by supplying specially crafted malformed JSON input to applications using the affected jsonparser Delete function. Exploitation requires low complexity and no user interaction, allowing network-based denial of service through induced runtime panics that crash the application.

Mitigation details are available in related advisories, including the Go vulnerability database entry GO-2026-4514 (pkg.go.dev/vuln/GO-2026-4514), the Golang vulndb issue (github.com/golang/vulndb/issues/4514), the jsonparser library issue (github.com/buger/jsonparser/issues/275), and security research from securityinfinity.com/research/buger-jsonparser-negative-slice-panic-dos-2026. Security practitioners should consult these for patch information and update guidance.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

The Delete function fails to properly validate offsets when processing malformed JSON input. This can lead to a negative slice index and a runtime panic, allowing a denial of service attack.

CWE(s)
CWE-129CWE-1285

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
T1211 Exploitation for Stealth Stealth
Adversaries may exploit vulnerabilities to evade detection by hiding activity, suppressing logging, or operating within trusted or unmonitored components.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-3357Shared CWE-1285, CWE-129
CVE-2026-2006Shared CWE-1285, CWE-129
CVE-2026-32286Shared CWE-1285, CWE-129
CVE-2026-40886Shared CWE-1285, CWE-129
CVE-2023-31309Shared CWE-129
CVE-2024-34048Shared CWE-129
CVE-2023-52987Shared CWE-129
CVE-2024-26968Shared CWE-129
CVE-2024-42148Shared CWE-129
CVE-2025-21680Shared CWE-129

Affected Assets

jsonparser project
jsonparser
≤ 1.1.2

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.4.2
  • V2.1.1
  • V2.2.1
  • V2.2.2

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match

Requires explicit validation of supplied indices/offsets/positions before they are used to access buffers or other indexable resources.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input validation and bounds checking that prevent improper array indexing.

ID.RA-01 partial match
prevents

Vulnerability identification processes can discover missing index validation via scanning or reviews.

PR.PS-02 partial match
prevents

Patching and replacement can remediate instances of the weakness after discovery.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development can detect out-of-bounds array access but does not prevent the weakness by itself.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle mandates input validation and bounds checking that directly prevents improper array indexing.

A.8.26 Application security requirements partial match
prevents

Application security requirements include validation of untrusted input used for indexing or addressing memory structures.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles encourage defensive coding patterns that reduce index-related vulnerabilities.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly require bounds checking and validation of array indices derived from untrusted data.

References