{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-19T20:57:17.309","vulnerabilities":[{"cve":{"id":"CVE-2026-26309","sourceIdentifier":"security-advisories@github.com","published":"2026-03-10T20:16:35.880","lastModified":"2026-03-11T16:14:20.730","vulnStatus":"Analyzed","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, an off-by-one write in Envoy::JsonEscaper::escapeString() can corrupt std::string null-termination, causing undefined behavior and potentially leading to crashes or out-of-bounds reads when the resulting string is later treated as a C-string. 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 borde/intermedio/servicio de alto rendimiento. Antes de 1.37.1, 1.36.5, 1.35.8 y 1.34.13, una escritura por un byte en Envoy::JsonEscaper::escapeString() puede corromper la terminación nula de std::string, causando comportamiento indefinido y potencialmente llevando a fallos o lecturas fuera de límites cuando la cadena resultante es tratada posteriormente como una cadena C. Esta vulnerabilidad está corregida en 1.37.1, 1.36.5, 1.35.8 y 1.34.13."}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":1.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":1.4}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Primary","description":[{"lang":"en","value":"CWE-193"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionEndExcluding":"1.34.13","matchCriteriaId":"C4169052-E37B-4577-8689-4DA8D6AFF3F3"},{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.35.0","versionEndExcluding":"1.35.8","matchCriteriaId":"35DB0A9F-BCEA-48D7-97DE-A63FA24B2032"},{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","versionStartIncluding":"1.36.0","versionEndExcluding":"1.36.5","matchCriteriaId":"B37DDD3B-8F92-4F76-B3B1-F3743CB41339"},{"vulnerable":true,"criteria":"cpe:2.3:a:envoyproxy:envoy:1.37.0:*:*:*:*:*:*:*","matchCriteriaId":"C5266F62-E0D2-4525-90B6-65921EE14F79"}]}]}],"references":[{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-56cj-wgg3-x943","source":"security-advisories@github.com","tags":["Vendor Advisory","Exploit"]}]}}]}