{"id":"CVE-2020-36846","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-36846","generatedAt":"2026-10-27T22:31:34.613Z","title":"A buffer overflow, as described in CVE-2020-8927, exists in the embedded Brotli library.","description":"A buffer overflow, as described in CVE-2020-8927, exists in the embedded Brotli library.  Versions of IO::Compress::Brotli prior to 0.007 included a version of the brotli library prior to version 1.0.8, where an attacker controlling the input length of a \"one-shot\" decompression request to a script can trigger a crash, which happens when copying over chunks of data larger than 2 GiB. It is recommended to update your IO::Compress::Brotli module to 0.007 or later. If one cannot update, we recommend to use the \"streaming\" API as opposed to the \"one-shot\" API, and impose chunk size limits.","published":"2025-05-30T01:15:21.000Z","lastModified":"2026-06-17T03:16:19.000Z","status":"Deferred","sourceIdentifier":"9b29abf9-4ab0-4765-b253-1875cd9b441e","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":[],"affected":[],"epss":{"score":0.00661,"percentile":0.51323,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.66%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/advisories/GHSA-5v8v-66v8-mwm7","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://github.com/google/brotli/commit/223d80cfbec8fd346e32906c732c8ede21f0cea6","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://github.com/google/brotli/pull/826","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://github.com/timlegge/perl-IO-Compress-Brotli/blob/8b44c83b23bb4658179e1494af4b725a1bc476bc/Changes#L52","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8927","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-36846","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}