Is CVE-2021-26291 in the CISA KEV catalog?

No. CVE-2021-26291 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-26291?

CVE-2021-26291 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2021-26291?

CVE-2021-26291 has an EPSS score of 8.69% (95th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-26291?

Upgrade maven on debian 12 to 3.8.6-1 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2021-26291

CRITICALEPSS 95th pctl

9.1

CVSS v3

NVD

Description

Apache Maven will follow repositories that are defined in a dependency’s Project Object Model (pom) which may be surprising to some users, resulting in potential risk if a malicious actor takes over that repository or is able to insert themselves into a position to pretend to be that repository. Maven is changing the default behavior in 3.8.1+ to no longer follow http (non-SSL) repository references by default. More details available in the referenced urls. If you are currently using a repository manager to govern the repositories used by your builds, you are unaffected by the risks present in the legacy behavior, and are unaffected by this vulnerability and change to default behavior. See this link for more information about repository management: https://maven.apache.org/repository-management.html

CWE-346

How to fix

Remediation Available

mavenDebian

Fixed in:3.8.6-1CVE-2021-26291

jenkinsRocky

Fixed in:0:2.426.3.1706516254-3.el8RHSA-2024:0776

Fixed in:0:2.426.3.1706515686-3.el8RHSA-2024:0778

Fixed in:0:2.426.3.1706516254-3.el8RHSA-2024:0776

Fixed in:0:2.387.1.1683009763-3.el8RHSA-2023:3198

Fixed in:0:2.426.3.1706515686-3.el8RHSA-2024:0778

jenkinsRed Hat / RHEL

Fixed in:0:2.426.3.1706516254-3.el8RHSA-2024:0776

Fixed in:0:2.387.1.1683009763-3.el8RHSA-2023:3198

Fixed in:0:2.426.3.1706516254-3.el8RHSA-2024:0776

Fixed in:0:2.426.3.1706515686-3.el8RHSA-2024:0778

jenkins-2-pluginsRocky

Fixed in:0:4.12.1706515741-1.el8RHSA-2024:0778

Fixed in:0:4.11.1683009941-1.el8RHSA-2023:3198

Fixed in:0:4.13.1706516346-1.el8RHSA-2024:0776

Fixed in:0:4.12.1706515741-1.el8RHSA-2024:0778

Fixed in:0:4.11.1683009941-1.el8RHSA-2023:3198

jenkins-2-pluginsRed Hat / RHEL

Fixed in:0:4.13.1706516346-1.el8RHSA-2024:0776

Fixed in:0:4.12.1706515741-1.el8RHSA-2024:0778

Fixed in:0:4.11.1683009941-1.el8RHSA-2023:3198

Fixed in:0:4.12.1706515741-1.el8RHSA-2024:0778

libmaven3-core-javaUbuntu

Fixed in:3.3.9-3ubuntu0.1~esm1USN-5245-1

Fixed in:3.6.0-1~18.04.1ubuntu0.1~esm1USN-5245-1

Fixed in:3.6.3-1ubuntu0.1~esm1USN-5245-1

Fixed in:3.6.3-5ubuntu0.1~esm1USN-5245-1

Fixed in:3.6.3-5ubuntu1.1USN-5805-1

mavenUbuntu

Fixed in:3.3.9-3ubuntu0.1~esm1USN-5245-1

Fixed in:3.6.0-1~18.04.1ubuntu0.1~esm1USN-5245-1

Fixed in:3.6.3-1ubuntu0.1~esm1USN-5245-1

Fixed in:3.6.3-5ubuntu0.1~esm1USN-5245-1

Fixed in:3.6.3-5ubuntu1.1USN-5805-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

8.69%probability of exploitation in 30 days

95thpercentile

High risk: more likely to be exploited than 95% of all known CVEs.

References

Related Vulnerabilities

Other CWE-346 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2009-1185	High	7.2	82%	-	Fix
CVE-2025-34291	High	8.8	79%	KEV	-
CVE-2020-16952	High	8.6	71%	-	-
CVE-2023-29711	Critical	9.8	70%	-	-
CVE-2015-4495	High	8.8	70%	KEV	Fix
CVE-2024-23898	High	8.8	67%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.