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      <title>CVE-2026-28377 — S3 SSE-C Encryption Key Exposed in Plaintext via Config Endpoint (CVE-2025-41118 Pattern)</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-28377</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Grafana Tempo&lt;/p&gt;
&lt;p&gt;A vulnerability in Grafana Tempo exposes the S3 SSE-C encryption key in plaintext through the /status/config endpoint, potentially allowing unauthorized users to obtain the key used to encrypt trace data stored in S3.&lt;/p&gt;
&lt;p&gt;Thanks to william_goodfellow for reporting this vulnerability.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Grafana Tempo&lt;/p&gt;
&lt;p&gt;A vulnerability in Grafana Tempo exposes the S3 SSE-C encryption key in plaintext through the /status/config endpoint, potentially allowing unauthorized users to obtain the key used to encrypt trace data stored in S3.&lt;/p&gt;
&lt;p&gt;Thanks to william_goodfellow for reporting this vulnerability.&lt;/p&gt;</content:encoded>
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