CVE-2026-55578

{"id": "CVE-2026-55578", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55578", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-07-28T14:03:49.769768Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "pheditor", "product": "pheditor", "versions": [{"status": "affected", "version": ">= 2.0.1, < 2.0.6"}]}]}], "published": "2026-07-27T18:16:56.730", "references": [{"url": "https://github.com/advisories/GHSA-9643-6xjp-vx57", "source": "security-advisories@github.com"}, {"url": "https://github.com/pheditor/pheditor/releases/tag/2.0.6", "source": "security-advisories@github.com"}, {"url": "https://github.com/pheditor/pheditor/security/advisories/GHSA-wg4w-wr5q-6vjc", "source": "security-advisories@github.com"}, {"url": "https://github.com/pheditor/pheditor/security/advisories/GHSA-wg4w-wr5q-6vjc", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-78"}]}], "descriptions": [{"lang": "en", "value": "Pheditor is a single-file editor and file manager written in PHP. From version 2.0.1 to before version 2.0.6, the terminal feature in Pheditor uses an incomplete character blocklist to sanitize user-supplied commands before passing them to shell_exec(). After the fix for GHSA-9643-6xjp-vx57 (which added $ to the blocklist), the characters | (single pipe), ` (backtick), and the newline byte (0x0A) remain unblocked. An authenticated user with the terminal permission (enabled by default) can leverage any of these to bypass the TERMINAL_COMMANDS allowlist and execute arbitrary OS commands as the web server user. This issue has been patched in version 2.0.6."}], "lastModified": "2026-07-28T15:17:19.233", "sourceIdentifier": "security-advisories@github.com"}