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Fencer Vulns
high 7.5

CVE-2020-28491 json

Denial of Service (DoS)

published 2021-02-18 5 y ago modified 2026-09-10 1 mo ago also GHSA-xmc8-26q4-qjhx , EUVD-2021-2611

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven com.fasterxml.jackson.dataformat:jackson-dataformat-cbor 2.11.4, 2.12.1
  • n/a com.fasterxml.jackson.dataformat:jackson-dataformat-cbor 2.11.4, 2.12.1
  • jackson-dataformat-cbor Debian 13 2.7.8-5.1

debian advisories DEBIAN-CVE-2020-28491

  • rh-sso7-keycloak red hat single sign on 7 9.0.15-1.redhat_00002.1.el8sso
  • rh-sso7-keycloak-server red hat single sign on 7 9.0.15-1.redhat_00002.1.el8sso
  • rh-sso7-keycloak red hat single sign on 7 9.0.15-1.redhat_00002.1.el7sso
  • rh-sso7-keycloak-server red hat single sign on 7 9.0.15-1.redhat_00002.1.el7sso
  • rh-sso7-keycloak red hat single sign on 7 9.0.15-1.redhat_00002.1.el6sso
  • rh-sso7-keycloak-server red hat single sign on 7 9.0.15-1.redhat_00002.1.el6sso

red hat advisories RHSA-2021:3529RHSA-2021:3528RHSA-2021:3527

  • jackson-core SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +12 more 2.13.0-150200.3.6.1
  • jackson-bom openSUSE Leap 15.4, openSUSE Leap 15.3 2.13.0-150200.3.3.1
  • jackson-databind SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +12 more 2.13.0-150200.3.9.1
  • jackson-annotations SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +12 more 2.13.0-150200.3.6.1
  • jackson-dataformats-binary SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +11 more 2.13.0-150200.3.3.3

suse advisories SUSE-SU-2022:1678-1

Exploit prediction

2.42% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven com.fasterxml.jackson.dataformat:jackson-dataformat-cbor
>=2.8.0rc1, <2.11.4
>=2.12.0rc1, <2.12.1
2.11.4
2.12.1

Affected products

  • n/a com.fasterxml.jackson.dataformat:jackson-dataformat-cbor

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.