CVE-2026-86319Public exploitNetwork attack vector

Service interruption via unbounded patch operations

Published Sep 7, 2026 · Updated Sep 9, 2026

Resource exhaustion in Java Json Tools json-patch 1.13 and earlier allows remote attackers to interrupt services via large JSON Patch documents. JsonPatch.apply iterates without an operation limit, timeout, or backpressure, while each operation deep-copies the growing JsonNode and multiplies CPU and memory work. Exposure requires an application endpoint that passes attacker-controlled JSON Patch documents to the library; processing can block threads and exhaust memory.

CVSS severity7.5
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Java Json Tools json-patch 1.13 and earlier allows remote attackers to interrupt services via large JSON Patch documents. JsonPatch.apply iterates without an operation limit, timeout, or backpressure, while each operation deep-copies the growing JsonNode and multiplies CPU and memory work. Exposure requires an application endpoint that passes attacker-controlled JSON Patch documents to the library; processing can block threads and exhaust memory.

The record

CVE
CVE-2026-86319
Published
Sep 7, 2026
Updated
Sep 9, 2026
Vendor
Starcounter-Jack
Product
JSON-Patch
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0
  2. Affected versionversion=1.1
  3. Affected versionversion=1.10
  4. Affected versionversion=1.11
  5. Affected versionversion=1.12
  6. Affected versionversion=1.13
  7. Affected versionversion=1.2
  8. Affected versionversion=1.3
  9. Affected versionversion=1.4
  10. Affected versionversion=1.5
  11. Affected versionversion=1.6
  12. Affected versionversion=1.7
  13. Affected versionversion=1.8
  14. Affected versionversion=1.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Starcounter-Jack · JSON-Patchversion=1.0; version=1.1; version=1.10; version=1.11; version=1.12; version=1.13; version=1.2; version=1.3; version=1.4; version=1.5; version=1.6; version=1.7; version=1.8; version=1.9

Published CVSS scores

5.5CVE ProgramCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
7.5Upstream issue reportCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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