{"cve":"CVE-2026-27576","nvd":{"published":"2026-02-21T10:16:13.437","modified":"2026-06-17T10:27:20.130","status":"Analyzed","description":"OpenClaw is a personal AI assistant. In versions 2026.2.17 and below, the ACP bridge accepts very large prompt text blocks and can assemble oversized prompt payloads before forwarding them to chat.send. Because ACP runs over local stdio, this mainly affects local ACP clients (for example IDE integrations) that send unusually large inputs. This issue has been fixed in version 2026.2.19.","cvss_v4":{"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","score":4.8},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":4.0},"cwes":["CWE-400"],"references":["https://github.com/openclaw/openclaw/commit/63e39d7f57ac4ad4a5e38d17e7394ae7c4dd0b9c","https://github.com/openclaw/openclaw/commit/8ae2d5110f6ceadef73822aa3db194fb60d2ba68","https://github.com/openclaw/openclaw/commit/ebcf19746f5c500a41817e03abecadea8655654a","https://github.com/openclaw/openclaw/releases/tag/v2026.2.19","https://github.com/openclaw/openclaw/security/advisories/GHSA-cxpw-2g23-2vgw"],"products":["openclaw:openclaw"],"source":"nvd","synced_at":"2026-10-19T22:24:17.937441719+00:00"},"epss":{"cve":"CVE-2026-27576","score":0.00185,"percentile":0.08155,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-cxpw-2g23-2vgw","url":"https://osv.dev/vulnerability/GHSA-cxpw-2g23-2vgw","summary":"OpenClaw: ACP prompt-size checks missing in local stdio bridge could reduce responsiveness with very large inputs","modified":"2026-02-23T22:55:24.173821Z","packages":[{"ecosystem":"npm","name":"openclaw","purl":"pkg:npm/openclaw","ranges":["<2026.2.19"],"fixed":["2026.2.19"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}