{"cve":"CVE-2023-27484","nvd":{"published":"2023-03-09T21:15:11.813","modified":"2026-06-17T05:45:18.440","status":"Modified","description":"crossplane-runtime is a set of go libraries used to build Kubernetes controllers in Crossplane and its related stacks. In affected versions an already highly privileged user able to create or update Compositions can specify an arbitrarily high index in a patch's `ToFieldPath`, which could lead to excessive memory usage once such Composition is selected for a Composite resource. Compositions allow users to specify patches inserting elements into arrays at an arbitrary index. When a Composition is selected for a Composite Resource, patches are evaluated and if a specified index is greater than the current size of the target slice, Crossplane will grow that slice up to the specified index, which could lead to an excessive amount of memory usage and therefore the Pod being OOM-Killed. The index is already capped to the maximum value for a uint32 (4294967295) when parsed, but that is still an unnecessarily large value. This issue has been addressed in versions 1.11.2, 1.10.3, and 1.9.2. Users are advised to upgrade. Users unable to upgrade can restrict write privileges on Compositions to only admin users as a workaround.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","score":4.9},"cwes":["CWE-400","CWE-20"],"references":["https://github.com/crossplane/crossplane/security/advisories/GHSA-v829-x6hh-cqfq","https://github.com/crossplane/crossplane/security/advisories/GHSA-v829-x6hh-cqfq"],"products":["crossplane:crossplane"],"source":"nvd","synced_at":"2026-10-19T21:37:41.955480748+00:00"},"epss":{"cve":"CVE-2023-27484","score":0.00678,"percentile":0.52329,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-v829-x6hh-cqfq","url":"https://osv.dev/vulnerability/GHSA-v829-x6hh-cqfq","summary":"Crossplane-runtime contains Improper Input Validation via Compositions","modified":"2026-09-10T03:49:57.023187767Z","packages":[{"ecosystem":"Go","name":"github.com/crossplane/crossplane","purl":"pkg:golang/github.com/crossplane/crossplane","ranges":["<1.9.2"],"fixed":["1.9.2"]},{"ecosystem":"Go","name":"github.com/crossplane/crossplane","purl":"pkg:golang/github.com/crossplane/crossplane","ranges":[">=1.10.0 <1.10.3"],"fixed":["1.10.3"]},{"ecosystem":"Go","name":"github.com/crossplane/crossplane","purl":"pkg:golang/github.com/crossplane/crossplane","ranges":[">=1.11.0 <1.11.2"],"fixed":["1.11.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}