CVE-2026-85473Public exploitNetwork attack vectorHinoki check available

Thread termination via unchecked timestamp conversion

Published Oct 13, 2026 · Updated Oct 13, 2026

Unchecked exceptions in Auth0 java-jwt 4.0.0 through 4.6.1 allow remote attackers to terminate threads via JWT timestamps. PayloadDeserializer.getInstantFromSeconds checks that exp, nbf, and iat fit in a long but converts them to Instant without containing an out-of-range DateTimeException, before signature verification. Exposure requires an application to parse externally supplied JWTs without containing that exception; repeated thread termination degrades service availability rather than granting access to data.

CVSS severity5.3
Medium
EPSS probability0.32%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Unchecked exceptions in Auth0 java-jwt 4.0.0 through 4.6.1 allow remote attackers to terminate threads via JWT timestamps. PayloadDeserializer.getInstantFromSeconds checks that exp, nbf, and iat fit in a long but converts them to Instant without containing an out-of-range DateTimeException, before signature verification. Exposure requires an application to parse externally supplied JWTs without containing that exception; repeated thread termination degrades service availability rather than granting access to data.

The record

CVE
CVE-2026-85473
Published
Oct 13, 2026
Updated
Oct 13, 2026
Vendor
Auth0
Product
java-jwt
Classifications
CWE-755, CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 13, 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=4.0.0 <4.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Auth0 · java-jwtversion=4.0.0 <4.6.2

Published CVSS scores

5.3Auth0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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-755Improper Handling of Exceptional Conditions
CWE-20Improper Input Validation
T1499.004Application or System Exploitation

Public exploit references

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Technologies

Your stack

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Your stack

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