{"id":"CVE-2026-56859","sourceIdentifier":"security@golang.org","published":"2026-08-13T22:17:22.320","lastModified":"2026-09-03T16:37:52.170","vulnStatus":"Awaiting Analysis","cveTags":[],"descriptions":[{"lang":"en","value":"Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion."}],"affected":[{"source":"security@golang.org","affectedData":[{"vendor":"Go standard library","product":"encoding/xml","defaultStatus":"unaffected","collectionURL":"https://pkg.go.dev","packageName":"encoding/xml","programRoutines":[{"name":"Decoder.push"},{"name":"Decoder.pop"},{"name":"Decoder.RawToken"},{"name":"Decoder.unmarshalPath"},{"name":"Decoder.unmarshal"},{"name":"Decoder.Decode"},{"name":"Decoder.DecodeElement"},{"name":"Decoder.Skip"},{"name":"Decoder.Token"},{"name":"Unmarshal"}],"versions":[{"version":"0","lessThan":"1.25.13","versionType":"semver","status":"affected"},{"version":"1.26.0-0","lessThan":"1.26.6","versionType":"semver","status":"affected"},{"version":"1.27.0-0","lessThan":"1.27.0-rc.3","versionType":"semver","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","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:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-14T15:21:09.615961Z","id":"CVE-2026-56859","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","description":[{"lang":"en","value":"CWE-770"}]}],"references":[{"url":"https://go.dev/cl/803320","source":"security@golang.org"},{"url":"https://go.dev/issue/80481","source":"security@golang.org"},{"url":"https://groups.google.com/g/golang-announce/c/94pEornpRlI","source":"security@golang.org"},{"url":"https://pkg.go.dev/vuln/GO-2026-6088","source":"security@golang.org"}]}