{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-53855: OpenClaw < 2026.4.2 - Shell Positional Parameters Bypass in Inline-Eval Checks","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-53855","status":"final","version":"1","initial_release_date":"2026-06-16T18:05:03.715Z","current_release_date":"2026-06-16T18:05:03.715Z","revision_history":[{"date":"2026-06-16T18:05:03.715Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"OpenClaw before 2026.4.2 contains an inline-eval bypass vulnerability allowing authenticated operators to weaken strict allowlist checks via shell positional parameters. Attackers can combine allowlisted tools with shell positional arguments to place inline-eval content in shell carriers outside intended allowlist rules, enabling execution of unapproved shell-provided content.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-53855 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-53855"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-53855"},{"category":"external","summary":"GitHub Security Advisory (GHSA-5cj2-3jr2-5h77)","url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-5cj2-3jr2-5h77"},{"category":"external","summary":"VulnCheck Advisory: OpenClaw < 2026.4.2 - Shell Positional Parameters Bypass in Inline-Eval Checks","url":"https://www.vulncheck.com/advisories/openclaw-shell-positional-parameters-bypass-in-inline-eval-checks"}]},"product_tree":{"branches":[{"category":"vendor","name":"OpenClaw","branches":[{"category":"product_name","name":"OpenClaw","branches":[{"category":"product_version_range","name":"<2026.4.2","product":{"name":"OpenClaw OpenClaw <2026.4.2","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"2026.4.2","product":{"name":"OpenClaw OpenClaw 2026.4.2","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-53855","title":"OpenClaw < 2026.4.2 - Shell Positional Parameters Bypass in Inline-Eval Checks","notes":[{"category":"description","text":"OpenClaw before 2026.4.2 contains an inline-eval bypass vulnerability allowing authenticated operators to weaken strict allowlist checks via shell positional parameters. Attackers can combine allowlisted tools with shell positional arguments to place inline-eval content in shell carriers outside intended allowlist rules, enabling execution of unapproved shell-provided content.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"],"fixed":["CSAFPID-2"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","baseScore":7.6,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 2026.4.2.","product_ids":["CSAFPID-1"]}]}]}