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CVE-2026-89407VulnerabilityPublished

Red Hat Security Advisory: jackson-core security update

Affects Red Hat jackson-coreSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-89407· High 7.5

Not known to be exploited · CVSS 7.5 High.

Data as of 11 Nov 2026, 13:20 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
FasterXMLjackson-coreAffected
  • >=2.17.0 <=2.18.10
  • >=2.19.0 <=2.21.6
  • >=2.22.0 <=2.22.2
Fixed in–
FasterXMLjackson-coreAffected
  • >=3.0.0 <=3.1.6
  • >=3.2.0 <=3.2.1
Fixed in–
MavenFasterXML/com.fasterxml.jackson.core:jackson-corepkg:maven/FasterXML/com.fasterxml.jackson.core:jackson-coreOther threatsAffected
  • >=2.17.0 <=2.18.10
  • >=2.19.0 <=2.21.6
  • >=2.22.0 <=2.22.2
Fixed in–
MavenFasterXML/tools.jackson.core:jackson-corepkg:maven/FasterXML/tools.jackson.core:jackson-coreOther threatsAffected
  • >=3.0.0 <=3.1.6
  • >=3.2.0 <=3.2.1
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

Core part of Jackson that defines Streaming API as well as basic shared abstractions. Security Fix(es): * com.fasterxml.jackson/jackson-core: tools.jackson.core/jackson-core: Jackson-core: Denial of Service via regular expression backtracking (CVE-2026-89407) * com.fasterxml.jackson.core/jackson-core: Jackson-core: Denial of Service via unbounded StringBuilder growth during malformed token processing (CVE-2026-89425) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

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