How severe is CVE-2020-28491?

CVE-2020-28491 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-28491 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28491?

CVE-2020-28491 primarily affects Fasterxml Jackson-dataformats-binary. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-28491?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-28491 published?

CVE-2020-28491 was published on 2021-02-18 and last updated on 2026-06-17.

CVE-2020-28491

CVE-2020-28491 is a high-severity vulnerability in Fasterxml Jackson-dataformats-binary with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Fasterxml Jackson-dataformats-binary
Published: 2021-02-18
Last modified: 2026-06-17

Description

This affects the package com.fasterxml.jackson.dataformat:jackson-dataformat-cbor from 0 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.

Frequently asked questions

What is CVE-2020-28491?: This affects the package com.fasterxml.jackson.dataformat:jackson-dataformat-cbor from 0 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.
How severe is CVE-2020-28491?: CVE-2020-28491 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-28491 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28491?: CVE-2020-28491 primarily affects Fasterxml Jackson-dataformats-binary. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-28491?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-28491 published?: CVE-2020-28491 was published on 2021-02-18 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:a:fasterxml:jackson-dataformats-binary:*:*:*:*:*:*:*:*
cpe:2.3:a:fasterxml:jackson-dataformats-binary:2.12.0:-:*:*:*:*:*:*
cpe:2.3:a:fasterxml:jackson-dataformats-binary:2.12.0:rc1:*:*:*:*:*:*
cpe:2.3:a:fasterxml:jackson-dataformats-binary:2.12.0:rc2:*:*:*:*:*:*
cpe:2.3:a:quarkus:quarkus:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:weblogic_server:12.2.1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:weblogic_server:12.2.1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:weblogic_server:14.1.1.0.0:*:*:*:*:*:*:*

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