CVE-2026-84645

Q: How do I fix CVE-2026-84645?

Upgrade jenkins to 2.580 or later.

Q: Is CVE-2026-84645 being actively exploited?

Not that we know of. CVE-2026-84645 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.66% is the estimated probability that it will be exploited in the next 30 days. That is higher than 50% of all scored CVEs.

Q: How severe is CVE-2026-84645?

CVE-2026-84645 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-84645 affect?

Published advisories record a fix for jenkins (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGH

8.8

CVSS v3

NVD

Description

In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, objects of types marked as storing their configuration in independent top-level configuration files in Jenkins (such as the global configuration and jobs) can appear as nested field values in user-submitted `config.xml` documents and subsequently handle HTTP requests via Stapler, resulting in remote code execution.

CWE-94Code Injection CWE-915

How to fix

Remediation Available

jenkinsNVD

Affected:< 2.580Fixed in:2.580CVE-2026-84645derived from NVD

Affected:< 2.568.3Fixed in:2.568.3CVE-2026-84645derived from NVD

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 RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.66%probability of exploitation in 30 days

50thpercentile

Moderate risk: more likely to be exploited than 50% of all known CVEs.

References

Vendor Advisory1

jenkins.io

Related Vulnerabilities

Other CWE-94 (Code Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-9841	Critical	9.8	100%	KEV	Fix
CVE-2015-1635	Critical	9.8	100%	KEV	-
CVE-2022-22954	Critical	9.8	100%	KEV + Ransom	-
CVE-2025-49704	High	8.8	100%	KEV + Ransom	Fix
CVE-2025-3248	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2021-22204	Medium	6.8	100%	KEV	Fix

Common questions

How do I fix CVE-2026-84645?

Upgrade jenkins to 2.580 or later.

Is CVE-2026-84645 being actively exploited?

Not that we know of. CVE-2026-84645 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.66% is the estimated probability that it will be exploited in the next 30 days. That is higher than 50% of all scored CVEs.

How severe is CVE-2026-84645?

CVE-2026-84645 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-84645 affect?

Published advisories record a fix for jenkins (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-84645

Markdown

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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 2026-09-11.