---
title: "com.fasterxml.jackson.core:jackson-databind — CVE-2026-91777"
description: "A denial of service flaw affects the Maven package com.fasterxml.jackson.core:jackson-databind. Affected versions: >= 2.19.0, <= 2.21.6. Fixed from version 2.21.7. CVSS score 7.5."
canonical: https://inyourgeek.com/en/failles-de-securite/2026-09-30-cve-2026-91777
type: faille-de-securite
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-09-30
dateModified: 2026-09-30
---
# com.fasterxml.jackson.core:jackson-databind — CVE-2026-91777

A denial of service flaw affects the Maven package com.fasterxml.jackson.core:jackson-databind. Affected versions: >= 2.19.0, <= 2.21.6. Fixed from version 2.21.7. CVSS score 7.5.

## What to do

Update com.fasterxml.jackson.core:jackson-databind to 2.21.7 or later.

| Fact | Value |
| --- | --- |
| Package | com.fasterxml.jackson.core:jackson-databind |
| Ecosystem | Maven (Java) |
| Class | Denial of service |
| Affected versions | >= 2.19.0, <= 2.21.6 |
| Fixed version | 2.21.7 |
| CVSS | 7.5 |
| CVE | CVE-2026-91777 |
| GHSA | GHSA-cxp5-3px4-pw24 |
| Published on | September 30, 2026 |
| Severity | High |

## Sources

- [GitHub Security Advisory — GHSA-cxp5-3px4-pw24](https://github.com/advisories/GHSA-cxp5-3px4-pw24) — GitHub Security Advisories
- [NVD — CVE-2026-91777](https://nvd.nist.gov/vuln/detail/CVE-2026-91777) — NVD

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