CVE-2026-25129

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{"affected": [{"affectedData": [{"product": "psysh", "vendor": "bobthecow", "versions": [{"status": "affected", "version": "< 0.11.23"}, {"status": "affected", "version": ">= 0.12.0, < 0.12.19"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:psysh:psysh:*:*:*:*:*:*:*:*", "matchCriteriaId": "DC5AF0E5-64F3-41E5-9702-1F5A6EF1E022", "versionEndExcluding": "0.11.23", "vulnerable": true}, {"criteria": "cpe:2.3:a:psysh:psysh:*:*:*:*:*:*:*:*", "matchCriteriaId": "767A36BE-AA1A-4E8D-B292-32B8250DCC9D", "versionEndExcluding": "0.12.19", "versionStartIncluding": "0.12.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "PsySH is a runtime developer console, interactive debugger, and REPL for PHP. Prior to versions 0.11.23 and 0.12.19, PsySH automatically loads and executes a `.psysh.php` file from the Current Working Directory (CWD) on startup. If an attacker can write to a directory that a victim later uses as their CWD when launching PsySH, the attacker can trigger arbitrary code execution in the victim's context. When the victim runs PsySH with elevated privileges (e.g., root), this results in local privilege escalation. This is a CWD configuration poisoning issue leading to arbitrary code execution in the victim user\u2019s context. If a privileged user (e.g., root, a CI runner, or an ops/debug account) launches PsySH with CWD set to an attacker-writable directory containing a malicious `.psysh.php`, the attacker can execute commands with that privileged user\u2019s permissions, resulting in local privilege escalation. Downstream consumers that embed PsySH inherit this risk. For example, Laravel Tinker (`php artisan tinker`) uses PsySH. If a privileged user runs Tinker while their shell is in an attacker-writable directory, the `.psysh.php` auto-load behavior can be abused in the same way to execute attacker-controlled code under the victim\u2019s privileges. Versions 0.11.23 and 0.12.19 patch the issue."}, {"lang": "es", "value": "PsySH es una consola de desarrollador en tiempo de ejecuci\u00f3n, depurador interactivo y REPL para PHP. Antes de las versiones 0.11.23 y 0.12.19, PsySH carga y ejecuta autom\u00e1ticamente un archivo '.psysh.php' desde el Directorio de Trabajo Actual (CWD) al inicio. Si un atacante puede escribir en un directorio que una v\u00edctima usa posteriormente como su CWD al iniciar PsySH, el atacante puede desencadenar la ejecuci\u00f3n de c\u00f3digo arbitrario en el contexto de la v\u00edctima. Cuando la v\u00edctima ejecuta PsySH con grandes privilegios (por ejemplo, root), esto resulta en una escalada de privilegios local. Este es un problema de envenenamiento de la configuraci\u00f3n del CWD que conduce a la ejecuci\u00f3n de c\u00f3digo arbitrario en el contexto del usuario v\u00edctima. Si un usuario privilegiado (por ejemplo, root, un ejecutor de CI o una cuenta de operaciones/depuraci\u00f3n) inicia PsySH con el CWD configurado en un directorio escribible por el atacante que contiene un '.psysh.php' malicioso, el atacante puede ejecutar comandos con los permisos de ese usuario privilegiado, lo que resulta en una escalada de privilegios local. Los consumidores posteriores que incrustan PsySH heredan este riesgo. Por ejemplo, Laravel Tinker (php artisan tinker) usa PsySH. Si un usuario privilegiado ejecuta Tinker mientras su shell est\u00e1 en un directorio escribible por el atacante, el comportamiento de carga autom\u00e1tica del '.psysh.php' puede ser abusado de la misma manera para ejecutar c\u00f3digo controlado por el atacante bajo los privilegios de la v\u00edctima. Las versiones 0.11.23 y 0.12.19 resuelven el problema."}], "id": "CVE-2026-25129", "lastModified": "2026-06-17T10:24:09.540", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.3, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-25129", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-02-02T15:44:26.134824Z", "version": "2.0.3"}}]}, "published": "2026-01-30T21:15:58.260", "references": [{"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/bobthecow/psysh/releases/tag/v0.11.23"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/bobthecow/psysh/releases/tag/v0.12.19"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/bobthecow/psysh/security/advisories/GHSA-4486-gxhx-5mg7"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-427"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T01:03:26.935770+00:00", "value": {"mitigation_remediation": ["Apply the official patch versions 0.11.23 or 0.12.19 from PsySH releases", "If patching is not immediately possible, avoid launching PsySH or any tool that embeds it while the current working directory is an attacker\u2011writable location", "Restrict filesystem permissions so that only trusted users can write into directories that may be used as the current working directory for privileged executions"], "summary": {"action": "Patch", "impact": "Local Privilege Escalation"}, "threat_synthesis": {"affected_systems": "Affected products include the PsySH console from bobthecow, specifically versions earlier than 0.11.23 and 0.12.19. Downstream consumers that embed PsySH, such as Laravel Tinker (php artisan tinker), inherit the same risk because they rely on the same auto\u2011load mechanism. Any user who runs these tools with elevated privileges from a directory that is writable by an attacker is susceptible.", "description_and_impact": "This vulnerability allows an attacker who can write to a directory that a user later uses as the current working directory to inject arbitrary PHP code via a file named .psysh.php. When PsySH starts it automatically loads and executes such a file, so a privileged user running PsySH will execute the attacker\u2019s code with the same privileges. The flaw stems from unsanitized path handling and is classified as CWE\u2011427, an environment variable or path manipulation issue leading to arbitrary code execution. The attack, if successful, grants complete control over the system under the victim\u2019s permissions, which can be exploited by root, CI runners, or any other privileged account that launches PsySH.", "risk_and_exploitability": "The CVSS score of 6.7 indicates a moderate severity. The EPSS score is less than 1%, suggesting a low probability of widespread exploitation, and the issue is not listed in CISA\u2019s KEV catalog. The likely attack vector is local; it requires the attacker to write a malicious .psysh.php file to a directory that the victim will later use as the current working directory when launching PsySH or a dependent tool. Once the victim runs the tool with elevated privileges, arbitrary code execution occurs, effectively escalating privileges to the user\u2019s level."}}}}, "created": "2026-02-02T09:26:54.495343+00:00", "updated": "2026-04-18T01:15:05.980273+00:00", "vendors": ["bobthecow", "bobthecow$PRODUCT$psysh"]}