How severe is GHSA-xmc8-26q4-qjhx?

GHSA-xmc8-26q4-qjhx has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by GHSA-xmc8-26q4-qjhx?

GHSA-xmc8-26q4-qjhx affects the following packages: com.fasterxml.jackson.dataformat:jackson-dataformat-cbor (Maven), com.fasterxml.jackson.dataformat:jackson-dataformat-cbor (Maven). Ecosystems affected: Maven.

How do I fix GHSA-xmc8-26q4-qjhx?

Update com.fasterxml.jackson.dataformat:jackson-dataformat-cbor to 2.11.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xmc8-26q4-qjhx is resolved across your whole dependency graph.

How do I detect GHSA-xmc8-26q4-qjhx in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.fasterxml.jackson.dataformat:jackson-dataformat-cbor, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-xmc8-26q4-qjhx if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is GHSA-xmc8-26q4-qjhx actively exploited in the wild?

No public exploit code has been indexed for GHSA-xmc8-26q4-qjhx yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-xmc8-26q4-qjhx?

GHSA-xmc8-26q4-qjhx has an EPSS (Exploit Prediction Scoring System) score of 3.1%, placing it in the 87th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-xmc8-26q4-qjhx?

GHSA-xmc8-26q4-qjhx is classified as CWE-770 (CWE-770). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-xmc8-26q4-qjhx published, and has it been updated?

GHSA-xmc8-26q4-qjhx was published on December 9, 2021 and was last updated on September 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

HIGH severity

Denial of Service (DoS) in Jackson Dataformat CBORGHSA-xmc8-26q4-qjhx

HIGHFix: FasterXML/jackson-dataformats-binary@3d7de83

GHSA-xmc8-26q4-qjhx is a high-severity (CVSS 7.5) CWE-770 vulnerability in com.fasterxml.jackson.dataformat:jackson-dataformat-cbor. A fix is available for com.fasterxml.jackson.dataformat:jackson-dataformat-cbor — see the affected versions and patch details below.

Also known asCVE-2020-28491SNYK-JAVA-COMFASTERXMLJACKSONDATAFORMAT-1047329

Published

Dec 9, 2021

Updated

Sep 10, 2026

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

3.1%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs87th percentile — riskier than 87% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-xmc8-26q4-qjhx by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

2 pkgs affected

☕com.fasterxml.jackson.dataformat:jackson-dataformat-cbor☕com.fasterxml.jackson.dataformat:jackson-dataformat-cbor

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

This affects the package com.fasterxml.jackson.dataformat:jackson-dataformat-cbor from 2.8.0-rc1 and before 2.11.4, from 2.12.0-rc1 and before 2.12.1. Unchecked allocation of byte buffer can cause a java.lang.OutOfMemoryError exception.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`com.fasterxml.jackson.dataformat:jackson-dataformat-cbor`	≥ 2.8.0rc1&&< 2.11.4	2.11.4`com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:2.11.4`
☕Maven	`com.fasterxml.jackson.dataformat:jackson-dataformat-cbor`	≥ 2.12.0rc1&&< 2.12.1	2.12.1`com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:2.12.1`

Affected Products

3 products · 9 configurations

Application

jackson-dataformats-binaryfasterxml

> 2.12.0 && < 2.12.1

1 version

2.12.0

Application

weblogic serveroracle

3 versions

12.2.1.3.012.2.1.4.014.1.1.0.0

Application

quarkusquarkus

< 2.0.2

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.fasterxml.jackson.dataformat:jackson-dataformat-cbor, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update com.fasterxml.jackson.dataformat:jackson-dataformat-cbor to 2.11.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xmc8-26q4-qjhx is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

In OpenShift Container Platform (OCP), the hive/presto/hadoop components that comprise the OCP metering stack, ship the vulnerable version of jackson-dataformat-cbor. Since the release of OCP 4.6, the metering product has been deprecated [1], hence the affected components are marked as wontfix. This may be fixed in…

Product	Fixed in	Advisory
OpenShift Logging 5.1	`openshift-logging/elasticsearch6-rhel8:v6.8.1-120`	RHSA-2022:0727
OpenShift Logging 5.2	`openshift-logging/elasticsearch6-rhel8:v6.8.1-124`	RHSA-2022:0728
OpenShift Logging 5.3	`openshift-logging/elasticsearch6-rhel8:v6.8.1-123`	RHSA-2022:0721
Red Hat build of Quarkus 2.2.3	`jackson-dataformat-cbor`	RHSA-2021:3880
Red Hat Fuse 7.10	`jackson-dataformat-cbor`	RHSA-2021:5134
Red Hat Integration	`jackson-dataformat-cbor`	RHSA-2021:4918
Red Hat Integration Camel Quarkus 2	see advisory	RHSA-2021:4767
Red Hat Single Sign-On 7.4.9	`jackson-dataformat-cbor`	RHSA-2021:3534

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is GHSA-xmc8-26q4-qjhx in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

7.5/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE Classification

CWE-770CWE-770

Weaponization

No known public exploit tooling found.

OpenSSF Scorecard

Package health score

jackson-dataformats-binary

7.2/10

Maintained10/10

Code-Review1/10

Branch-Protection0/10

Assessed Oct 5, 2026

Timeline

Disclosed

Dec 9, 2021

Last updated

Sep 10, 2026

Identifiers

GHSA-xmc8-26q4-qjhx

SNYK-JAVA-COMFASTERXMLJACKSONDATAFORMAT-1047329

References

Advisorynvd.nist.gov Webgithub.com Webgithub.com Webgithub.com Websnyk.io Weboracle.com Packagegithub.com

Related vulnerabilities

This CVE is high severity; 3 of 8 other CVEs with CWE-770 are rated as high or higher (top: high).

CVE-2026-64847CVE-2026-77281CVE-2026-69147CVE-2026-81176CVE-2026-75516CVE-2026-82399CVE-2026-77403CVE-2026-57173Browse all CWE-770

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedSep 10, 2026

Denial of Service (DoS) in Jackson Dataformat CBORGHSA-xmc8-26q4-qjhx

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Fixing This On Your OS

Frequently Asked Questions

Is GHSA-xmc8-26q4-qjhx in your dependencies?