--- title: "CVE-2026-116589: Datadog dd-trace-py - Denial of Service" description: "Datadog dd-trace-py 3.13.0 to <4.15.5 contains a denial of service caused by improper handling of internal errors in IAST string-processing instrumentation with old-style % string formatting, letting attackers terminate the Python process, exploit requires IAST enabled and attacker-controlled input in formatting." url: https://panop.io/threat-heartbeat/CVE-2026-116589/ --- # CVE-2026-116589 Datadog dd-trace-py - Denial of Service Datadog dd-trace-py 3.13.0 to <4.15.5 contains a denial of service caused by improper handling of internal errors in IAST string-processing instrumentation with old-style % string formatting, letting attackers terminate the Python process, exploit requires IAST enabled and attacker-controlled input in formatting. CVSS base score 8.2 /10 High CISA KEV Not listed Public exploit None known [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-116589) ## Details Type Denial of Service Impact Denial Of Service CVSS vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Published 26 October 2026 Updated 27 October 2026 Weakness [CWE-248](https://cwe.mitre.org/data/definitions/248.html) ## Vendor fix Upgrade to version 4.15.5 or later. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-116589](https://nvd.nist.gov/vuln/detail/CVE-2026-116589) - [https://github.com/DataDog/dd-trace-py/security/advisories/GHSA-p3m5-h5v9-vqj6](https://github.com/DataDog/dd-trace-py/security/advisories/GHSA-p3m5-h5v9-vqj6) - [https://github.com/DataDog/dd-trace-py/commit/69dc19853247434ceab83e0c1c4e279a2eb2a3f7](https://github.com/DataDog/dd-trace-py/commit/69dc19853247434ceab83e0c1c4e279a2eb2a3f7) - [https://github.com/DataDog/dd-trace-py/commit/ace972489b57dd020ff52b706bb548a354f2dd69](https://github.com/DataDog/dd-trace-py/commit/ace972489b57dd020ff52b706bb548a354f2dd69) - [https://github.com/DataDog/dd-trace-py/pull/20786](https://github.com/DataDog/dd-trace-py/pull/20786) - [https://github.com/DataDog/dd-trace-py/pull/20823](https://github.com/DataDog/dd-trace-py/pull/20823) - [https://github.com/DataDog/dd-trace-py/releases/tag/v4.15.5](https://github.com/DataDog/dd-trace-py/releases/tag/v4.15.5) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)