CVE-2020-28491 | Denial of Service (DoS)

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.

Published: 2021-02-18 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-28491 is rated Moderate Risk (62.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.07%). EPSS rose +2.76% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-28491

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.32% 3.07% +2.76%
2 2026-05-13 0.39% 0.32% -0.07%
3 2026-03-04 — 0.39% —

Full EPSS history (23 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-28491

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-28491

GitHub Security Advisory for CVE-2020-28491

GHSA-xmc8-26q4-qjhx · Severity: high · Ecosystem: maven — Denial of Service (DoS) in Jackson Dataformat CBOR

OS Trackers for CVE-2020-28491

vendor priority summary link
debian not yet assigned CVE-2020-28491 not yet assigned priority: Debian including 1 source packages (jackson-dataformat-cbor), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. https://security-tracker.debian.org/tracker/CVE-2020-28491
redhat medium — https://access.redhat.com/security/cve/CVE-2020-28491
suse high — https://www.suse.com/security/cve/CVE-2020-28491/
ubuntu medium CVE-2020-28491 medium priority: Ubuntu including 1 source packages (jackson-dataformat-cbor), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 8, needed 6, DNE 1, needs-triage 1. https://ubuntu.com/security/CVE-2020-28491

Affected software / configurations for CVE-2020-28491

Vendor Product Version Raw CPE
fasterxml jackson-dataformats-binary < 2.11.4 cpe:2.3:a:fasterxml:jackson-dataformats-binary:*:*:*:*:*:*:*:*
fasterxml jackson-dataformats-binary > 2.12.0, < 2.12.1 cpe:2.3:a:fasterxml:jackson-dataformats-binary:*:*:*:*:*:*:*:*
fasterxml jackson-dataformats-binary 2.12.0 cpe:2.3:a:fasterxml:jackson-dataformats-binary:2.12.0:-:*:*:*:*:*:*
fasterxml jackson-dataformats-binary 2.12.0 cpe:2.3:a:fasterxml:jackson-dataformats-binary:2.12.0:rc1:*:*:*:*:*:*
fasterxml jackson-dataformats-binary 2.12.0 cpe:2.3:a:fasterxml:jackson-dataformats-binary:2.12.0:rc2:*:*:*:*:*:*
quarkus quarkus < 2.0.2 cpe:2.3:a:quarkus:quarkus:*:*:*:*:*:*:*:*
oracle weblogic_server 12.2.1.3.0 cpe:2.3:a:oracle:weblogic_server:12.2.1.3.0:*:*:*:*:*:*:*
oracle weblogic_server 12.2.1.4.0 cpe:2.3:a:oracle:weblogic_server:12.2.1.4.0:*:*:*:*:*:*:*
oracle weblogic_server 14.1.1.0.0 cpe:2.3:a:oracle:weblogic_server:14.1.1.0.0:*:*:*:*:*:*:*

References for CVE-2020-28491

cvelogic Threat Intelligence