How severe is CVE-2018-12557?

CVE-2018-12557 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-12557 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-12557?

CVE-2018-12557 affects Zuul-ci Zuul. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-12557?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-12557 published?

CVE-2018-12557 was published on 2018-06-19 and last updated on 2026-06-17.

CVE-2018-12557

CVE-2018-12557 is a critical-severity vulnerability in Zuul-ci Zuul with a CVSS 3.x base score of 9.8. 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-200.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 5.0
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Zuul-ci Zuul
Published: 2018-06-19
Last modified: 2026-06-17

Description

An issue was discovered in Zuul 3.x before 3.1.0. If nodes become offline during the build, the no_log attribute of a task is ignored. If the unreachable error occurred in a task used with a loop variable (e.g., with_items), the contents of the loop items would be printed in the console. This could lead to accidentally leaking credentials or secrets.

Frequently asked questions

What is CVE-2018-12557?: An issue was discovered in Zuul 3.x before 3.1.0. If nodes become offline during the build, the no_log attribute of a task is ignored. If the unreachable error occurred in a task used with a loop variable (e.g., with_items), the contents of the loop items would be printed in the console. This could lead to accidentally leaking credentials or secrets.
How severe is CVE-2018-12557?: CVE-2018-12557 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-12557 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-12557?: CVE-2018-12557 affects Zuul-ci Zuul. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-12557?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-12557 published?: CVE-2018-12557 was published on 2018-06-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:zuul-ci:zuul:*:*:*:*:*:*:*:*

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