CVE-2021-22557: Code execution in SLO Generator via YAML Payload

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-10-04 · updated 2026-06-17
Weakness: CWE-94

Description

SLO generator allows for loading of YAML files that if crafted in a specific format can allow for code execution within the context of the SLO Generator. We recommend upgrading SLO Generator past https://github.com/google/slo-generator/pull/173

Affected products

Google LLC SLO Generator: before 2.0.1 — fixed in 2.0.1

How to fix

Upgrade to a fixed version: Google LLC SLO Generator 2.0.1. Check the vendor advisory for mitigations.

References

http://packetstormsecurity.com/files/164426/Google-SLO-Generator-2.0.0-Code-Execution.html
https://github.com/google/slo-generator/pull/173
http://packetstormsecurity.com/files/164426/Google-SLO-Generator-2.0.0-Code-Execution.html
https://github.com/google/slo-generator/pull/173

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