CVE-2026-68496Public exploitNetwork attack vectorHinoki check available

Memory-exhaustion DoS via unchecked Smile property names

Published Oct 1, 2026 · Updated Oct 1, 2026

Denial of service in FasterXML Jackson Dataformats Binary allows remote attackers to exhaust memory via crafted Smile documents. SmileParser._handleLongFieldName() grows its name buffer without calling StreamReadConstraints.validateNameLength(), accepting property names beyond the configured limit. Exploitation requires attacker-controlled bytes to reach an application’s Smile parser; memory exhaustion can interrupt that application.

CVSS severity7.5
High
EPSS probability0.67%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in FasterXML Jackson Dataformats Binary allows remote attackers to exhaust memory via crafted Smile documents. SmileParser._handleLongFieldName() grows its name buffer without calling StreamReadConstraints.validateNameLength(), accepting property names beyond the configured limit. Exploitation requires attacker-controlled bytes to reach an application’s Smile parser; memory exhaustion can interrupt that application.

The record

CVE
CVE-2026-68496
Published
Oct 1, 2026
Updated
Oct 1, 2026
Vendor
FasterXML
Product
Jackson Dataformats Binary
Classifications
CWE-400, CWE-770, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 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=2.16.0 <=2.18.9
  2. Affected versionversion=2.19.0 <=2.21.5
  3. Affected versionversion=2.22.0 <=2.22.1
  4. Affected versionversion=3.0.0 <=3.1.5
  5. Affected versionversion=3.2.0 <=3.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FasterXML · Jackson Dataformats Binaryversion=2.16.0 <=2.18.9; version=2.19.0 <=2.21.5; version=2.22.0 <=2.22.1; version=3.0.0 <=3.1.5; version=3.2.0 <=3.2.1

Published CVSS scores

7.5HeroDevs CNACVSS: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.

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

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 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
CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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