Brotli
Monthly
Remote code execution is possible in Node.js releases that bundle a vulnerable Brotli decoder: a malformed brotli-compressed stream can trigger an out-of-bounds write when decompressed, corrupting memory in the process handling the data. Exposure is limited to deployments that actually pass attacker-controlled brotli data into the decoder - for example services honouring Content-Encoding: br on untrusted requests or responses, or applications calling zlib.brotliDecompress/BrotliDecompress on untrusted input - and no authentication or user interaction is required in that scenario. The flaw is rated High with a CVSS 4.0 score of 9.2 (assessed CVSS 3.1: AV:N/AC:H/PR:N/UI:N/C:H/I:H/A:H), no CISA KEV listing confirms active exploitation, and a public PoC reference exists but is not verified as working exploit code; the vendor fix is Node.js v26.12.1, released 2026-10-21.
A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a "one-shot" decompression request to a script can trigger a crash, which. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Remote code execution is possible in Node.js releases that bundle a vulnerable Brotli decoder: a malformed brotli-compressed stream can trigger an out-of-bounds write when decompressed, corrupting memory in the process handling the data. Exposure is limited to deployments that actually pass attacker-controlled brotli data into the decoder - for example services honouring Content-Encoding: br on untrusted requests or responses, or applications calling zlib.brotliDecompress/BrotliDecompress on untrusted input - and no authentication or user interaction is required in that scenario. The flaw is rated High with a CVSS 4.0 score of 9.2 (assessed CVSS 3.1: AV:N/AC:H/PR:N/UI:N/C:H/I:H/A:H), no CISA KEV listing confirms active exploitation, and a public PoC reference exists but is not verified as working exploit code; the vendor fix is Node.js v26.12.1, released 2026-10-21.
A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a "one-shot" decompression request to a script can trigger a crash, which. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.