{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-29181/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":7.5,"id":"CVE-2026-29181"}],"_cs_exploited":false,"_cs_products":["OpenTelemetry-Go"],"_cs_severities":["medium"],"_cs_tags":["dos","opentelemetry","cve-2026-29181"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eCVE-2026-29181 describes a vulnerability within the OpenTelemetry-Go library. Specifically, the manner in which the library handles HTTP requests containing multiple values within the \u003ccode\u003ebaggage\u003c/code\u003e header can be exploited. An attacker can craft malicious requests with excessively large or numerous baggage values, leading to excessive memory allocations on the server. This resource exhaustion can ultimately result in a denial-of-service condition, impacting the availability of services relying on the vulnerable OpenTelemetry-Go component. This vulnerability highlights the importance of careful input validation and resource management in telemetry libraries.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker identifies a service using a vulnerable version of OpenTelemetry-Go.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts an HTTP request targeting an endpoint monitored by OpenTelemetry.\u003c/li\u003e\n\u003cli\u003eThe crafted HTTP request includes a \u003ccode\u003ebaggage\u003c/code\u003e header containing numerous values or excessively large individual values.\u003c/li\u003e\n\u003cli\u003eThe OpenTelemetry-Go library attempts to extract and process these baggage values upon receiving the request.\u003c/li\u003e\n\u003cli\u003eThe baggage extraction process triggers excessive memory allocations due to the large number or size of baggage values.\u003c/li\u003e\n\u003cli\u003eRepeated requests of this nature rapidly consume available server memory.\u003c/li\u003e\n\u003cli\u003eThe server\u0026rsquo;s performance degrades significantly as it struggles to allocate memory.\u003c/li\u003e\n\u003cli\u003eUltimately, the server becomes unresponsive, resulting in a denial-of-service condition, making the service unavailable to legitimate users.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-29181 leads to a denial-of-service condition. The number of affected services depends on the prevalence of vulnerable OpenTelemetry-Go library versions in production environments. Affected services become unavailable, disrupting normal operations and potentially leading to financial losses or reputational damage. The impact is amplified if critical infrastructure components rely on the vulnerable services.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade OpenTelemetry-Go to a patched version that addresses CVE-2026-29181 to prevent excessive memory allocation.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u003ccode\u003eDetect Suspicious Baggage Header Size\u003c/code\u003e to identify potentially malicious requests exploiting this vulnerability.\u003c/li\u003e\n\u003cli\u003eImplement rate limiting on HTTP endpoints that are monitored by OpenTelemetry to mitigate the impact of denial-of-service attacks.\u003c/li\u003e\n\u003cli\u003eReview and adjust memory allocation limits for services using OpenTelemetry-Go to prevent resource exhaustion.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-29T07:33:41Z","date_published":"2026-04-29T07:33:41Z","id":"/briefs/2026-04-opentelemetry-dos/","summary":"A vulnerability in OpenTelemetry-Go related to the extraction of multi-value baggage headers can lead to excessive resource allocation, resulting in a remote denial-of-service amplification.","title":"OpenTelemetry-Go Multi-Value Baggage Header Extraction DoS Vulnerability (CVE-2026-29181)","url":"https://feed.craftedsignal.io/briefs/2026-04-opentelemetry-dos/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-29181","version":"https://jsonfeed.org/version/1.1"}