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[UPDATE] [medium] FasterXML Jackson: Vulnerability enables denial of service

mediumCVE-2026-18401
A remote anonymous attacker can exploit a vulnerability in FasterXML Jackson to conduct a denial of service attack.

CSIRTS triage

vendor: FasterXMLproduct: JacksonDenial of service
What
A vulnerability in FasterXML Jackson allows remote anonymous attackers to conduct a denial of service attack.
Who is affected
Applications using FasterXML Jackson and processing untrusted input are affected.
Urgency
Medium severity; denial of service is possible but not as critical as remote code execution.
Action
Update FasterXML Jackson to a patched version addressing CVE-2026-18401.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
medium
Published
2026-08-05
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0555

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-18401coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for FasterXML Jackson

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CERT-Bund (BSI) Security Advisories