CVE-2021-4235

mediumpriority · track · 22EPSS 0.004 · 37 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.43% (37th) EPSS

CVSS 5.5 · medium

Is it mine?

34 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · cert_bund

EPSS · scored 2026-10-27

Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.

cvss

Technical severity, 0–10. One row per scoring source.

5.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 3.6

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Hsecondaryexploitability 1.8 · impact 3.6

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Hsecondary · OSV

v3.15.1mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USLLM-inferredCWE-476USLLM-inferred

affected products (34)

Products and version ranges known to be affected.

Atlassian Bitbucket <10.0.2all versionscert_bundDE
Atlassian Bitbucket <8.19.25 (LTS)all versionscert_bundDE
Atlassian Bitbucket <9.4.13 (LTS)all versionscert_bundDE
Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Gentoo Linuxall versionscert_bundDEcpe:/o:gentoo:linux:-
Meinberg LANTIME <7.08.007all versionscert_bundDE
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat Enterprise Linux Advanced Cluster Security for Kubernetes 4all versionscert_bundDEcpe:/o:redhat:enterprise_linux:advanced_cluster_security_for_kubernetes_4
Red Hat Enterprise Linux Service Interconnect 1all versionscert_bundDEcpe:/o:redhat:enterprise_linux:service_interconnect_1
Red Hat OpenShiftall versionscert_bundDEcpe:/a:redhat:openshift:-
Red Hat OpenShift Container Platform 4.12all versionscert_bundDEcpe:/a:redhat:openshift:container_platform_4.12
Red Hat OpenShift Container Platform <4.12.22all versionscert_bundDE
Red Hat OpenShift Container Platform <4.12.46all versionscert_bundDE
Red Hat OpenShift Container Platform <4.13.4all versionscert_bundDE
Red Hat OpenShift Container Platform <4.14.0all versionscert_bundDE
Red Hat OpenShift Data Foundation <4.12.10all versionscert_bundDE
Red Hat OpenShift Data Foundation <4.13.0all versionscert_bundDE
Atlassian Bitbucket< 10.0.2cert_bundDE
Atlassian Bitbucket< 8.19.25 (LTS)cert_bundDE

showing 20 of 34

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-0111Red Hat OpenShift: Mehrere SchwachstellenDeutsch2023-01-17csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Red Hat OpenShift ausnutzen, um einen Denial of Service Angriff durchzuführen, vertrauliche Informationen offenzulegen, Sicherheitsmaßnahmen zu umgehen und Daten zu manipulieren.
WID-SEC-W-2023-1542Red Hat OpenShift: Mehrere SchwachstellenDeutsch2023-06-22csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat OpenShift ausnutzen, um einen Denial of Service Zustand herbeizuführen, Informationen offenzulegen, Dateien zu manipulieren oder Sicherheitsvorkehrungen zu umgehen.
GHSA-r88r-gmrh-7j83YAML Go package vulnerable to denial of service2022-12-28ghsa · osvUS
Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.
GO-2021-0061Denial of service in gopkg.in/yaml.v22021-04-14vendor · osvUS
Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv cert_bund NVD CVE.org MITRE

published 2022-12-27modified 2026-06-17

references (24)

External citations — patches, advisories, analysis.

scry

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