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    <lastBuildDate>Tue, 29 Sep 2026 22:38:38 +0000</lastBuildDate>
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      <title>CVE-2026-39373 — JWCrypto: JWE ZIP decompression bomb</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-39373</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; latchset jwcrypto&lt;/p&gt;
&lt;p&gt;JWCrypto implements JWK, JWS, and JWE specifications using python-cryptography. Prior to 1.5.7, an unauthenticated attacker can exhaust server memory by sending crafted JWE tokens with ZIP compression. The existing patch for CVE-2024-28102  limits input token size to 250KB but does not validate the decompressed output size. An unauthenticated attacker can cause memory exhaustion on memory-constrained systems. A token under the 250KB input limit can decompress to approximately 100MB. This vulnerability is fixed in 1.5.7.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; latchset jwcrypto&lt;/p&gt;
&lt;p&gt;JWCrypto implements JWK, JWS, and JWE specifications using python-cryptography. Prior to 1.5.7, an unauthenticated attacker can exhaust server memory by sending crafted JWE tokens with ZIP compression. The existing patch for CVE-2024-28102  limits input token size to 250KB but does not validate the decompressed output size. An unauthenticated attacker can cause memory exhaustion on memory-constrained systems. A token under the 250KB input limit can decompress to approximately 100MB. This vulnerability is fixed in 1.5.7.&lt;/p&gt;</content:encoded>
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