{"id":"CVE-2026-54425","aliases":[],"cve":{"records":[{"id":"CVE-2026-54425","source":"apache","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-06-14T06:18:42.168Z","published":"2026-10-21T11:31:19.989Z","modified":"2026-10-30T13:45:53.356Z"}],"publishers":[{"name":"apache","role":"CNA","organizationId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","modified":"2026-10-21T11:31:19.989Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-30T13:45:53.356Z"}],"references":[{"url":"https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb","tags":["vendor-advisory"],"source":"apache"}],"weaknesses":[{"id":"CWE-674","description":"CWE-674 Uncontrolled Recursion","source":"apache"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-30T13:45:42.813783Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"yes"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Apache bRPC: Stack Exhaustion via Recursive HPACK Dynamic Table Size Update Decoding","titleSource":"apache","descriptionSource":"apache","description":"Uncontrolled recursion in the HTTP/2 HPACK decoder in Apache bRPC before 1.18.0 allows remote attackers to cause denial of service by sending a crafted HTTP/2 header block containing many consecutive Dynamic Table Size Update entries. Each update was decoded by recursively invoking the HPACK decoder, which could exhaust the thread stack before a header field or end of input was reached.\n\nRoot Cause:\nThe bRPC HPACK decoder recursively decoded the next entry after processing a Dynamic Table Size Update. The decoder did not bound the recursion depth, so a long sequence of update entries could consume excessive stack space.\n\nAffected Scenarios:\nUse bRPC with the built-in HTTP/2 implementation to accept HTTP/2 traffic from an untrusted network.\n\nHow to Fix:\n1. Upgrade bRPC to version 1.18.0, which fixes this issue.\n2. Apply this patch:  https://github.com/apache/brpc/pull/3343 \n\nNote:\nThe fix changes HPACK Dynamic Table Size Update decoding to use iterative parsing instead of recursive parsing.","score":7.5,"severity":"high","published":"2026-10-21T11:31:19.989Z","modified":"2026-10-30T13:45:53.356Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Apache Software Foundation","name":"Apache bRPC","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"1.18.0","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:github/apache/brpc","cpes":[],"source":"apache","url":"https://www.cve.org/CVERecord?id=CVE-2026-54425"}],"remediation":[],"references":["https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb"],"sources":[{"name":"CVE","id":"CVE-2026-54425","modified":"2026-10-30T13:45:53.356Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-54425"}],"assessments":[{"source":"CISA-ADP","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5}],"sourceAffected":[],"observedAt":"2026-10-30T15:33:28.672Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T09:15:31.262Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-30T15:50:39.951Z","attemptedAt":"2026-10-30T15:50:39.951Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-30T15:50:43.156Z","attemptedAt":"2026-10-30T15:50:43.156Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-30T15:50:41.960Z","attemptedAt":"2026-10-30T15:50:41.960Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-30T15:50:37.342Z","attemptedAt":"2026-10-30T15:50:37.342Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-54425","url":"https://www.first.org/epss/","probability":0.00257,"percentile":0.17385,"date":"2026-10-30","checkedAt":"2026-10-30T15:50:37.342Z"},{"source":"NVD","id":"CVE-2026-54425","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54425","modified":"2026-10-30T14:17:05.960","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-10-30T15:50:39.951Z"},{"source":"ENISA EUVD","id":"EUVD-2026-107169","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-107169","modified":"Oct 30, 2026, 1:45:53 PM","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-10-30T15:50:41.960Z"},{"source":"GitHub Advisory Database","id":"GHSA-95vv-8ch6-6f8f","url":"https://github.com/advisories/GHSA-95vv-8ch6-6f8f","modified":"2026-10-30T15:35:17Z","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-10-30T15:50:43.156Z"}],"aiSummary":null}