{"id":"CVE-2026-57054","state":"PUBLISHED","title":"Junos OS: MX Series: Web filtering doesn't block specifically formatted URLs","description":"A Use of Incorrectly-Resolved Name or Reference vulnerability in the URL filtering plugin of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to bypass web filtering and access downstream resources that should be unreachable.\n\n\n\nIf an MX Series device is configured with web filtering, and an attacker sends a request with a specifically formatted URL, this request will get forwarded despite the system being configured to block it. In turn, an attacker can access downstream resources that are expected to be unreachable.\n\nThis issue affects Junos OS on MX Series:\n\n\n  *  all versions before 23.2R2-S7,\n  *  23.4 versions before 23.4R2-S8,\n  *  24.2 versions before 24.2R2-S5,\n  *  24.4 versions before 24.4R2-S4,\n  *  25.2 versions before 25.2R2-S1,\n  *  25.4 versions before 25.4R1-S2, 25.4R2.","publishedAt":"2026-07-09T21:14:33.905Z","updatedAt":"2026-07-10T14:34:09.815Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/AU:Y/RE:M","source":"juniper"},"assigner":"juniper","products":["Juniper Networks Junos OS"],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"23.2R2-S7","versionType":"custom"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S8","versionType":"custom"},{"version":"24.2","status":"affected","lessThan":"24.2R2-S5","versionType":"custom"},{"version":"24.4","status":"affected","lessThan":"24.4R2-S4","versionType":"custom"},{"version":"25.2","status":"affected","lessThan":"25.2R2-S1","versionType":"custom"},{"version":"25.4","status":"affected","lessThan":"25.4R1-S2, 25.4R2","versionType":"custom"}],"platforms":["MX Series"]}],"references":["https://supportportal.juniper.net/JSA110093"],"weaknesses":["CWE-706"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/57xxx/CVE-2026-57054.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-57054","state":"PUBLISHED","datePublished":"2026-07-09T21:14:33.905Z","dateUpdated":"2026-07-10T14:34:09.815Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2026-06-23T16:55:07.912Z"},"containers":{"cna":{"title":"Junos OS: MX Series: Web filtering doesn't block specifically formatted URLs","descriptions":[{"lang":"en","value":"A Use of Incorrectly-Resolved Name or Reference vulnerability in the URL filtering plugin of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to bypass web filtering and access downstream resources that should be unreachable.\n\n\n\nIf an MX Series device is configured with web filtering, and an attacker sends a request with a specifically formatted URL, this request will get forwarded despite the system being configured to block it. In turn, an attacker can access downstream resources that are expected to be unreachable.\n\nThis issue affects Junos OS on MX Series:\n\n\n  *  all versions before 23.2R2-S7,\n  *  23.4 versions before 23.4R2-S8,\n  *  24.2 versions before 24.2R2-S5,\n  *  24.4 versions before 24.4R2-S4,\n  *  25.2 versions before 25.2R2-S1,\n  *  25.4 versions before 25.4R1-S2, 25.4R2."}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"23.2R2-S7","versionType":"custom"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S8","versionType":"custom"},{"version":"24.2","status":"affected","lessThan":"24.2R2-S5","versionType":"custom"},{"version":"24.4","status":"affected","lessThan":"24.4R2-S4","versionType":"custom"},{"version":"25.2","status":"affected","lessThan":"25.2R2-S1","versionType":"custom"},{"version":"25.4","status":"affected","lessThan":"25.4R1-S2, 25.4R2","versionType":"custom"}],"platforms":["MX Series"]}],"references":[{"url":"https://supportportal.juniper.net/JSA110093","tags":["vendor-advisory"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.8,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]},{"cvssV4_0":{"Automatable":"YES","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/AU:Y/RE:M","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"MODERATE"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-706","description":"CWE-706 Use of Incorrectly-Resolved Name or Reference","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"juniper","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateUpdated":"2026-07-09T21:14:33.905Z"},"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"To be exposed to this issue an MX Series device needs to be configured to filter specific URLs as follows:<br><br><tt>[ services service-set &lt;set-name&gt; web-filter-profile &lt;profile-name&gt; ]<br>[&nbsp;services web-filter profile &lt;profile-name&gt; url-filter-template &lt;template-name&gt; url-filter-database &lt;file-with-URLs-to-filter&gt; ]</tt>"}],"value":"To be exposed to this issue an MX Series device needs to be configured to filter specific URLs as follows:\n\n[ services service-set <set-name> web-filter-profile <profile-name> ]\n[ services web-filter profile <profile-name> url-filter-template <template-name> url-filter-database <file-with-URLs-to-filter> ]"}],"datePublic":"2026-07-08T16:00:00.000Z","exploits":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The following software releases have been updated to resolve this specific issue:\n\nJunos OS: 23.2R2-S7, 23.4R2-S8, 24.2R2-S5, 24.4R2-S4, 25.2R2-S1, 25.4R1-S2, 25.4R2, 26.2R1, and all subsequent releases."}],"value":"The following software releases have been updated to resolve this specific issue:\n\nJunos OS: 23.2R2-S7, 23.4R2-S8, 24.2R2-S5, 24.4R2-S4, 25.2R2-S1, 25.4R1-S2, 25.4R2, 26.2R1, and all subsequent releases."}],"source":{"advisory":"JSA110093","defect":["1926259"],"discovery":"USER"},"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"There are no known workarounds for this issue."}],"value":"There are no known workarounds for this issue."}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-10T14:33:58.330913Z","id":"CVE-2026-57054","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-10T14:34:09.815Z"}}]}}}