CVE-2026-40261 | Composer Perforce Reference command injection

VDB-357668 · CVE-2026-40261 · GCVE-0-2026-40261 COMPOSER PERFORCE REFERENCE COMMAND INJECTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.0 $0-$5k 4.07+ Summaryinfo A vulnerability labeled as critical has been found in Composer. This vulnerability affects unknown code of the component Perforce Reference Handler. Such manipulation leads to command injection. This vulnerability is listed as CVE-2026-40261. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded. Detailsinfo A vulnerability was found in Composer (the affected version unknown). It has been rated as critical. Affected by this issue is an unknown part of the component Perforce Reference Handler. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-40261. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1202. Upgrading eliminates this vulnerability. Productinfo Name Composer CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.0 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Command injection CWE: CWE-77 / CWE-74 / CWE-707 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Timelineinfo 04/15/2026 Advisory disclosed 04/15/2026 +0 days VulDB entry created 04/15/2026 +0 days VulDB entry last update Sourcesinfo Advisory: github.com Status: Confirmed CVE: CVE-2026-40261 (🔒) GCVE (CVE): GCVE-0-2026-40261 GCVE (VulDB): GCVE-100-357668 Entryinfo Created: 04/15/2026 07:37 Changes: 04/15/2026 07:37 (49) Complete: 🔍 Cache ID: 99:DD1:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸