How severe is CVE-2026-70428?

CVE-2026-70428 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-70428 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-70428?

CVE-2026-70428 primarily affects Jenkins. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-70428?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-70428 published?

CVE-2026-70428 was published on 2026-08-05 and last updated on 2026-09-08.

CVE-2026-70428

CVE-2026-70428 is a medium-severity vulnerability in Jenkins with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Jenkins
Published: 2026-08-05
Last modified: 2026-09-08

Description

Jenkins 2.575 and earlier, LTS 2.568.1 and earlier improperly identifies file paths attempting path traversal in file parameter names, allowing attackers with Item/Configure and Item/Build permission to write files to arbitrary locations on the controller file system.

Frequently asked questions

What is CVE-2026-70428?: Jenkins 2.575 and earlier, LTS 2.568.1 and earlier improperly identifies file paths attempting path traversal in file parameter names, allowing attackers with Item/Configure and Item/Build permission to write files to arbitrary locations on the controller file system.
How severe is CVE-2026-70428?: CVE-2026-70428 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-70428 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-70428?: CVE-2026-70428 primarily affects Jenkins. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-70428?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-70428 published?: CVE-2026-70428 was published on 2026-08-05 and last updated on 2026-09-08.

References

https://www.jenkins.io/security/advisory/2026-08-05/#SECURITY-3927

Affected products (2)

cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*
cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

116.196.119.94 (ipv4-addr)
47.254.36.213 (ipv4-addr)