How severe is CVE-2019-1003026?

CVE-2019-1003026 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-2019-1003026 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-1003026?

CVE-2019-1003026 affects Jenkins Mattermost. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-1003026?

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

When was CVE-2019-1003026 published?

CVE-2019-1003026 was published on 2019-02-20 and last updated on 2026-06-17.

CVE-2019-1003026

CVE-2019-1003026 is a medium-severity vulnerability in Jenkins Mattermost 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-918.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Jenkins Mattermost
Published: 2019-02-20
Last modified: 2026-06-17

Description

A server-side request forgery vulnerability exists in Jenkins Mattermost Notification Plugin 2.6.2 and earlier in MattermostNotifier.java that allows attackers with Overall/Read permission to have Jenkins connect to an attacker-specified Mattermost server and room and send a message.

Frequently asked questions

What is CVE-2019-1003026?: A server-side request forgery vulnerability exists in Jenkins Mattermost Notification Plugin 2.6.2 and earlier in MattermostNotifier.java that allows attackers with Overall/Read permission to have Jenkins connect to an attacker-specified Mattermost server and room and send a message.
How severe is CVE-2019-1003026?: CVE-2019-1003026 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-2019-1003026 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-1003026?: CVE-2019-1003026 affects Jenkins Mattermost. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-1003026?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-1003026 published?: CVE-2019-1003026 was published on 2019-02-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jenkins:mattermost:*:*:*:*:*:jenkins:*:*

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