CVE-2026-79787

criticalCVSS 9.8covered by 1 sourcefirst seen 2026-08-25

Alluxio's S3 REST proxy fails to verify AWS Signature Version 4 signatures in its default configuration, allowing unauthenticated attackers to spoof user identity. Attackers can extract usernames from unsigned Authorization headers and impersonate any user, including service accounts, to read, write, and delete arbitrary data.

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Advisory coverage (1)

criticalCVE-2026-79787: Alluxio's S3 REST proxy fails to verify AWS Signature Version 4 signatures in its default conf…nvd · 2026-08-25

External references

NVD record for CVE-2026-79787

CVE.org record

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