RHSA-2026:86706

Vulnerability from csaf_opensuse - Published: 2026-10-21 08:55 - Updated: 2026-10-29 06:08
Summary
Red Hat Security Advisory: jackson-core security update
Severity
Moderate
Notes
Topic: An update for jackson-core is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: 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.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2026-89407

A flaw was found in jackson-core. An attacker can supply specially crafted JSON that, when deserialized into a numeric target type, triggers a Regular expression Denial of Service (ReDoS) vulnerability. This occurs due to quadratic backtracking in the NumberInput.looksLikeValidNumber() method's PATTERN_FLOAT regular expression. A small number of concurrent requests with a long input string can exhaust a server's request-handling thread pool, leading to a Denial of Service (DoS).

5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-1333 - Inefficient Regular Expression Complexity
Affected products
Product Identifier Version Remediation
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:jackson-core-0:2.21.6-1.el9_8.2.src —
Vendor Fix fix
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:pki-jackson-core-0:2.21.6-1.el9_8.2.noarch —
Vendor Fix fix
Threats
Impact Moderate
CVE-2026-89425

A flaw was found in FasterXML jackson-core. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by providing a specially crafted, malformed token to the JsonFactory.createParser(DataInput) method. The UTF8DataInputJsonParser component, responsible for handling DataInput sources, does not properly limit the size of the error message generated for invalid tokens. This unbounded growth of the StringBuilder can consume excessive memory, leading to an OutOfMemoryError and crashing the Java Virtual Machine (JVM).

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-1050 - Excessive Platform Resource Consumption within a Loop
Affected products
Fixed 2 products, the same list as for CVE-2026-89407
Threats
Impact Important
References
To clipboard 

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}



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