{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-57026", "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "state": "PUBLISHED", "assignerShortName": "juniper", "dateReserved": "2026-06-23T16:27:00.248Z", "datePublished": "2026-07-09T21:07:44.855Z", "dateUpdated": "2026-07-09T21:07:44.855Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "platforms": ["SRX Series", "MX Series with SPC3"], "product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "23.2R2-S7", "status": "affected", "version": "0", "versionType": "custom"}, {"lessThan": "23.4R2-S8", "status": "affected", "version": "23.4", "versionType": "custom"}, {"lessThan": "24.2R2-S5", "status": "affected", "version": "24.2", "versionType": "custom"}, {"lessThan": "24.4R2-S4", "status": "affected", "version": "24.4", "versionType": "custom"}, {"lessThan": "25.2R2", "status": "affected", "version": "25.2", "versionType": "custom"}, {"lessThan": "25.4R1-S2", "status": "affected", "version": "25.4", "versionType": "custom"}]}], "configurations": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "To be affected the SIP ALG needs to be enabled, either implicitly / by default or by way of configuration. Please verify with:<br><br><tt>user@host&gt; show security alg status | match sip<br>SIP : Enabled</tt>"}], "value": "To be affected the SIP ALG needs to be enabled, either implicitly / by default or by way of configuration. Please verify with:\n\nuser@host> show security alg status | match sip\nSIP : Enabled"}], "datePublic": "2026-07-08T16:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "An Improper Validation of Syntactic Correctness of Input vulnerability in the SIP plugin of Juniper Networks Junos OS on MX Series with SPC3 and SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).<p>If the SIP ALG is enabled on an affected device, the processing of a malformed SIP invite packet will cause a flow processing daemon (flowd) crash and restart. This leads to a complete service outage until the system has automatically recovered.<br></p><p><br>This issue affects Junos OS on MX Series with SPC3 and SRX Series:<br></p><ul><li>all versions before 23.2R2-S7,</li><li>23.4 versions before 23.4R2-S8,</li><li>24.2 versions before 24.2R2-S5,</li><li>24.4 versions before 24.4R2-S4,</li><li>25.2 versions before 25.2R2,</li><li>25.4 versions before 25.4R1-S2.</li></ul><br><p></p>"}], "value": "An Improper Validation of Syntactic Correctness of Input vulnerability in the SIP plugin of Juniper Networks Junos OS on MX Series with SPC3 and SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).If the SIP ALG is enabled on an affected device, the processing of a malformed SIP invite packet will cause a flow processing daemon (flowd) crash and restart. This leads to a complete service outage until the system has automatically recovered.\n\n\n\nThis issue affects Junos OS on MX Series with SPC3 and SRX 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,\n * 25.4 versions before 25.4R1-S2."}], "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."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}, {"cvssV4_0": {"Automatable": "YES", "Recovery": "AUTOMATIC", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 8.7, "baseSeverity": "HIGH", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "MODERATE"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-1286", "description": "CWE-1286 Improper Validation of Syntactic Correctness of Input", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper", "dateUpdated": "2026-07-09T21:07:44.855Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://supportportal.juniper.net/JSA110086"}], "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, 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, 25.4R1-S2, 25.4R2, 26.2R1, and all subsequent releases."}], "source": {"advisory": "JSA110086", "defect": ["1932051"], "discovery": "USER"}, "title": "Junos OS: MX Series with SPC3, SRX Series: Processing of a specifically malformed SIP invite causes a flowd crash", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "There are no known workarounds for this issue.<br><br>\n\n<span style=\"background-color: rgb(251, 251, 251);\">To reduce the risk of exploitation customers not requiring the SIP ALG functionality could explicitly disable it (in case it's by default enabled) by configuring:</span><br><br><tt>[ security alg sip disable ]</tt>\n\n<br>"}], "value": "There are no known workarounds for this issue.\n\n\n\nTo reduce the risk of exploitation customers not requiring the SIP ALG functionality could explicitly disable it (in case it's by default enabled) by configuring:\n\n[ security alg sip disable ]"}], "x_generator": {"engine": "Vulnogram 0.1.0-dev"}}}}

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