{"id":"CVE-2026-77620","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-77620","generatedAt":"2026-10-28T01:50:12.157Z","title":"An unauthenticated remote peer that can reach the default 0.0.0.0:5044 listener can send many nested compressed frames, causing recursive decoding that exhausts the worker thread stack and aborts the process.","description":"Vector is a high-performance observability data pipeline. From 0.15.0 until 0.57.0, the logstash source feeds each decompressed frame back into its decoder without limiting nested compression depth. An unauthenticated remote peer that can reach the default 0.0.0.0:5044 listener can send many nested compressed frames, causing recursive decoding that exhausts the worker thread stack and aborts the process. The same nested construction amplifies decompressed input, and process termination can halt log ingestion for every tenant on a shared pipeline. This issue is fixed in version 0.57.0.","published":"2026-09-22T16:17:56.000Z","lastModified":"2026-09-24T21:23:54.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":8.7,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-409"],"affected":[],"epss":{"score":0.00524,"percentile":0.44161,"date":"2026-10-26","history":[{"date":"2026-09-23","score":0.00524,"percentile":0.4343}]},"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 (0.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-22T16:17:56.000Z","detail":{"score":"8.7","severity":"HIGH","publishedAt":"2026-09-22T16:17:55.500Z"},"summary":"New CVE, high severity (CVSS 8.7)."}],"references":[{"url":"https://github.com/vectordotdev/vector/commit/57fed991083c9a43d5fda2d5b3bf4718aedf6526","source":"security-advisories@github.com"},{"url":"https://github.com/vectordotdev/vector/pull/25825","source":"security-advisories@github.com"},{"url":"https://github.com/vectordotdev/vector/releases/tag/v0.57.0","source":"security-advisories@github.com"},{"url":"https://github.com/vectordotdev/vector/security/advisories/GHSA-qp6f-fpfx-4gg6","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77620","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."}