{"id":"CVE-2026-6594","state":"PUBLISHED","title":"brikcss merge prototype pollution","description":"A vulnerability was determined in brikcss merge up to 1.3.0. This affects an unknown part. Executing a manipulation of the argument __proto__/constructor.prototype/prototype can lead to improperly controlled modification of object prototype attributes. The attack may be performed from remote. The vendor was contacted early about this disclosure but did not respond in any way.","publishedAt":"2026-04-20T01:45:12.099Z","updatedAt":"2026-04-20T14:53:13.499Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X","source":"VulDB"},"assigner":"VulDB","products":["brikcss merge"],"affected":[{"vendor":"brikcss","product":"merge","versions":[{"version":"1.0","status":"affected"},{"version":"1.1","status":"affected"},{"version":"1.2","status":"affected"},{"version":"1.3.0","status":"affected"}]}],"references":["https://vuldb.com/vuln/358229","https://vuldb.com/vuln/358229/cti","https://vuldb.com/submit/791805","https://github.com/sudo-secure/security-research/blob/main/brikcss-merge/prototype-pollution/PoC.md"],"weaknesses":["CWE-1321","CWE-94"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/6xxx/CVE-2026-6594.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-6594","state":"PUBLISHED","datePublished":"2026-04-20T01:45:12.099Z","dateUpdated":"2026-04-20T14:53:13.499Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-04-19T10:42:43.695Z"},"containers":{"cna":{"title":"brikcss merge prototype pollution","descriptions":[{"lang":"en","value":"A vulnerability was determined in brikcss merge up to 1.3.0. This affects an unknown part. Executing a manipulation of the argument __proto__/constructor.prototype/prototype can lead to improperly controlled modification of object prototype attributes. The attack may be performed from remote. The vendor was contacted early about this disclosure but did not respond in any way."}],"affected":[{"vendor":"brikcss","product":"merge","versions":[{"version":"1.0","status":"affected"},{"version":"1.1","status":"affected"},{"version":"1.2","status":"affected"},{"version":"1.3.0","status":"affected"}]}],"references":[{"url":"https://vuldb.com/vuln/358229","name":"VDB-358229 | brikcss merge prototype pollution","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/vuln/358229/cti","name":"VDB-358229 | CTI Indicators (IOB, IOC, TTP, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/submit/791805","name":"Submit #791805 | brikcss @brikcss/merge 1.3.0 Prototype Pollution","tags":["third-party-advisory"]},{"url":"https://github.com/sudo-secure/security-research/blob/main/brikcss-merge/prototype-pollution/PoC.md","tags":["exploit"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":6.9,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X","baseSeverity":"MEDIUM"}},{"cvssV3_1":{"version":"3.1","baseScore":7.3,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R","baseSeverity":"HIGH"}},{"cvssV3_0":{"version":"3.0","baseScore":7.3,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R","baseSeverity":"HIGH"}},{"cvssV2_0":{"version":"2.0","baseScore":7.5,"vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:ND/RL:ND/RC:UR"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1321","type":"CWE","lang":"en","description":"Improperly Controlled Modification of Object Prototype Attributes"}]},{"descriptions":[{"cweId":"CWE-94","type":"CWE","lang":"en","description":"Code Injection"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-04-20T01:45:12.099Z"},"timeline":[{"time":"2026-04-19T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-04-19T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-04-19T12:47:54.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"sudosme (VulDB User)","type":"reporter"},{"lang":"en","value":"VulDB CNA Team","type":"coordinator"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-20T14:53:05.141628Z","id":"CVE-2026-6594","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-20T14:53:13.499Z"}}]}}}