{"id":"CVE-2026-116588","revision":null,"records":[{"revision":"c10b918d57004aefa98f9ffe2152f1f4","observedAt":"2026-10-26T22:35:30.956+00:00","statement":{"source":"cve-program","id":"CVE-2026-116588","aliases":[],"title":"Datadog dd-trace-py: ReDOS in URL query string obfuscation","description":"Datadog dd-trace-py is the Datadog Python APM client. From 1.5.0 until 3.19.9 and 4.15.6, the default query-string obfuscation regular expression can exhibit excessive backtracking while synchronously processing attacker-controlled URL query strings for HTTP span metadata. A remote attacker can cause prolonged CPU consumption, request latency, and service unavailability in affected HTTP tracing integrations that include query strings in URL span tags. The vulnerable processing is enabled by default for those integrations. This issue is fixed in versions 3.19.9 and 4.15.6.","state":0,"publishedAt":"2026-10-26T21:22:46.13+00:00","modifiedAt":"2026-10-26T21:22:46.13+00:00","affected":[{"ecosystem":"Vendor product","name":"dd-trace-py","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"DataDog\",\n                    \"product\": \"dd-trace-py\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 1.5.0, < 3.19.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 4.0.0, < 4.15.6\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"}],"references":["https://github.com/DataDog/dd-trace-py/security/advisories/GHSA-3633-r77q-h3v3","https://github.com/DataDog/dd-trace-py/pull/20857","https://github.com/DataDog/dd-trace-py/pull/20862","https://github.com/DataDog/dd-trace-py/pull/20880","https://github.com/DataDog/dd-trace-py/commit/63ddc3cb07d8813ded7a8b3ab5b8d0f5470e4bfd","https://github.com/DataDog/dd-trace-py/commit/83ea39845dd95bfb9b8e247c62b3d22fc5dce1ce","https://github.com/DataDog/dd-trace-py/commit/a6d73607ea45ecd67152630f64b0945556972ed8","https://github.com/DataDog/dd-trace-py/releases/tag/v3.19.9","https://github.com/DataDog/dd-trace-py/releases/tag/v4.15.6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116588","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-116588","identifiers":["CVE-2026-116588"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-01T14:57:20.8260435+00:00","complete":true,"records":1095,"lastAttemptAt":"2026-11-01T14:57:20.8260435+00:00","lastSuccessAt":"2026-11-01T14:57:20.9969402+00:00","error":null,"lastVerifiedAt":"2026-11-01T14:57:20.9969412+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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