jackson-core: ReDoS: quadratic backtracking in NumberInput.PATTERN_FLOAT via looksLikeValidNumber()

Date Oct 1, 2026

Type Vendor advisory

Signal High-risk advisory

Vendor / Product Maven · com.fasterxml.jackson.core:jackson-core

CVE CVE-2026-89407

High-risk advisory CVE-2026-89407

Summary

jackson-core: ReDoS: quadratic backtracking in NumberInput.PATTERN_FLOAT via looksLikeValidNumber()

Why it matters

GitHub has published a reviewed security advisory for com.fasterxml.jackson.core:jackson-core. Prioritize it with other application dependency updates, especially because EPSS places it in the 48% percentile.

Operator check

Check whether com.fasterxml.jackson.core:jackson-core is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.6%; percentile: 48%.

Sources

GitHub Advisory GHSA-p6pp-m3f8-5c89 NVD — CVE-2026-89407 Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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