CVE-2026-88369

Process crash via unbounded recursive token dumping

Published Sep 24, 2026 · Updated Sep 24, 2026

Buffer overflow in dump() in zserge jsmn commit 25647e6 allows attackers to crash jsondump via crafted JSON input. The example/jsondump.c routine recursively walks parser-generated object and array tokens without enforcing a nesting-depth limit, so deeply nested input exhausts the call stack. Exploitation requires feeding untrusted JSON to the example jsondump utility; no broader impact has been published.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in dump() in zserge jsmn commit 25647e6 allows attackers to crash jsondump via crafted JSON input. The example/jsondump.c routine recursively walks parser-generated object and array tokens without enforcing a nesting-depth limit, so deeply nested input exhausts the call stack. Exploitation requires feeding untrusted JSON to the example jsondump utility; no broader impact has been published.

The record

CVE
CVE-2026-88369
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499.004
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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