CVE-2026-26310

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{"affected": [{"affectedData": [{"product": "envoy", "vendor": "envoyproxy", "versions": [{"status": "affected", "version": ">= 1.37.0, < 1.37.1"}, {"status": "affected", "version": ">= 1.36.0, < 1.36.5"}, {"status": "affected", "version": ">= 1.35.0, < 1.35.9"}, {"status": "affected", "version": "< 1.34.13"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "matchCriteriaId": "C4169052-E37B-4577-8689-4DA8D6AFF3F3", "versionEndExcluding": "1.34.13", "vulnerable": true}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "matchCriteriaId": "35DB0A9F-BCEA-48D7-97DE-A63FA24B2032", "versionEndExcluding": "1.35.8", "versionStartIncluding": "1.35.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "matchCriteriaId": "B37DDD3B-8F92-4F76-B3B1-F3743CB41339", "versionEndExcluding": "1.36.5", "versionStartIncluding": "1.36.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:1.37.0:*:*:*:*:*:*:*", "matchCriteriaId": "C5266F62-E0D2-4525-90B6-65921EE14F79", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13."}, {"lang": "es", "value": "Envoy es un proxy de alto rendimiento de borde/intermedio/servicio. Antes de 1.37.1, 1.36.5, 1.35.8 y 1.34.13, llamar a Utility::getAddressWithPort con direcciones IPv6 con \u00e1mbito causa un fallo. Esta utilidad es llamada en el plano de datos desde el filtro original_src y el filtro dns. Esta vulnerabilidad est\u00e1 corregida en 1.37.1, 1.36.5, 1.35.8 y 1.34.13."}], "id": "CVE-2026-26310", "lastModified": "2026-06-17T10:26:04.063", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-26310", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-10T20:10:56.890236Z", "version": "2.0.3"}}]}, "published": "2026-03-10T20:16:36.030", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-3cw6-2j68-868p"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.37.0,1.37.1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.36.0,1.36.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.35.0,1.35.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.34.13)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "envoy", "source": "cna", "vendor": "envoyproxy"}, "product": "envoy", "vendor": "envoyproxy"}], "analysis": {"en": {"generated_at": "2026-04-16T03:30:04.528427+00:00", "value": {"mitigation_remediation": ["Upgrade Envoy to at least 1.37.1, or to 1.36.5, 1.35.8, or 1.34.13 as appropriate for the installed release.", "If upgrade cannot be performed immediately, consider disabling the original_src and dns filters that invoke the vulnerable routine until a patch is available.", "Configure monitoring to alert on service restarts or crash logs that may indicate exploitation attempts."], "summary": {"action": "Patch Now", "impact": "Denial of Service (Crash)"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Envoy versions prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13. Any deployment of these releases that employs the original_src or dns filters is susceptible. The product is listed as envoyproxy:envoy. No additional product or vendor variants are affected.", "description_and_impact": "An input validation flaw in Envoy\u2019s Utility::getAddressWithPort routine causes a crash when presented with a scoped IPv6 address. This flaw can terminate the data plane process, leading to service disruption. The underlying weakness is an improper input validation vulnerability, mapped to CWE\u201120. The impact is a loss of availability for the affected proxy instance.", "risk_and_exploitability": "The CVSS v3.1 score of 5.9 indicates moderate severity. The EPSS score of\u00a0<\u00a01% suggests the probability of exploitation is very low at present, and the vulnerability is not listed in the CISA KEV catalog. Likely, an attacker could trigger the crash by sending a specially crafted packet that forces Envoy to resolve an IP address with a scope identifier through the vulnerable filters. The attack vector is inferred to be remote, arising from data plane traffic that the proxy processes."}}}}, "created": "2026-03-11T11:43:25.248172+00:00", "updated": "2026-04-16T03:30:06.071059+00:00", "vendors": ["envoyproxy", "envoyproxy$PRODUCT$envoy"]}