Red Hat Security Advisory: jackson-core security update
Affects Red Hat jackson-coreSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 7.5 High.
Data as of 11 Nov 2026, 13:20 UTC
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 22 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| FasterXMLjackson-core | Affected
| Fixed in– |
| FasterXMLjackson-core | Affected
| Fixed in– |
MavenFasterXML/com.fasterxml.jackson.core:jackson-corepkg:maven/FasterXML/com.fasterxml.jackson.core:jackson-coreOther threats | Affected
| Fixed in– |
MavenFasterXML/tools.jackson.core:jackson-corepkg:maven/FasterXML/tools.jackson.core:jackson-coreOther threats | Affected
| 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
- access.redhat.com/errata/RHSA-2026:98493 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2538720 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2539084 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_98493.json (opens in a new tab)