megachangelog
Security3.11.3

3.11.3 — Multiple security issues fixed

This release addresses three critical security vulnerabilities: an OAuth client_secret exposure in AzureAD remote write configuration, a snappy-compressed request handling issue in remote-read, and a stored XSS vulnerability in the old UI heatmap chart. All issues have been patched and coordinated disclosure credits have been provided.

This release fixes mutiple security issues.

We would like to thank the following people for the responsible disclosures:

  • Shadowbyte (4c1dr3aper) - Charlie Lewis for the Remote-Read snappy decode vulnerability.

  • Brett Gervasoni for the AzureAD OAuth client_secret vulnerability.

  • @iiihaiii and @ngocnn97 for the Old UI XSS vulnerability.

  • [SECURITY] AzureAD remote write: Fix OAuth client_secret being exposed in plaintext via /-/config endpoint. GHSA-wg65-39gg-5wfj / CVE-2026-42151 #18590

  • [SECURITY] Remote-read: Reject snappy-compressed requests whose declared decoded length exceeds the decode limit. GHSA-8rm2-7qqf-34qm / CVE-2026-42154 #18584

  • [SECURITY] UI: Fix stored XSS via unescaped le label values in old UI heatmap chart tick labels. GHSA-fw8g-cg8f-9j28 #18588

securityvulnerabilityoauthxsscve

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