CVE-2026-86513Public exploitNetwork attack vector

Service interruption via unbounded JSON Pointer parsing

Published Sep 8, 2026 · Updated Sep 8, 2026

Resource exhaustion in jackson-coreutils 2.0 allows remote attackers to crash a consuming JVM with a deeply segmented JSON Pointer. TreePointer.tokensFromInput repeatedly copies the remaining input with substring() while retaining every parsed segment in an unbounded ArrayList. Exposure requires an application endpoint to pass attacker-controlled JSON Pointer data to the library; CPU saturation or OutOfMemoryError can interrupt that service.

CVSS severityUnavailable
Unscored
EPSS probability0.40%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Resource exhaustion in jackson-coreutils 2.0 allows remote attackers to crash a consuming JVM with a deeply segmented JSON Pointer. TreePointer.tokensFromInput repeatedly copies the remaining input with substring() while retaining every parsed segment in an unbounded ArrayList. Exposure requires an application endpoint to pass attacker-controlled JSON Pointer data to the library; CPU saturation or OutOfMemoryError can interrupt that service.

The record

CVE
CVE-2026-86513
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
Starcounter-Jack
Product
jackson-coreutils
Classifications
CWE-770, CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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?

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

  1. Affected versionversion=2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Starcounter-Jack · jackson-coreutilsversion=2.0

Published CVSS scores

5.0VulDB CNAAV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:UR
6.9VulDB CNACVSS: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
5.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
5.3VulDB CNACVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

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 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources
CWE-400Resource Consumption
T1499Endpoint Denial of Service

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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