Unrated

Denial of Service in Datadog dd-trace-rb W3C baggage header extraction

IdentifiersCVE-2026-50276CWE-770

CVE-2026-50276 is a denial-of-service vulnerability in Datadog's Ruby tracing library, dd-trace-rb. When W3C baggage propagation is enabled, the library parses incoming baggage HTTP headers during extraction without enforcing the configured limits on item count or total byte size. The limits intended to constrain baggage processing were applied only when injecting outbound baggage, not when extracting inbound baggage. As a result, an attacker can supply a baggage header containing an excessive number of comma-separated key-value pairs or a very large value, causing the tracer to create hash-map entries for each parsed item on every request. This leads to unbounded resource consumption during request processing in instrumented HTTP services.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows a remote, unauthenticated attacker to trigger excessive CPU and memory consumption in affected HTTP services that use the vulnerable tracer with baggage propagation enabled. The resulting resource exhaustion can degrade performance or render the service unavailable, producing a remote denial of service.

Mitigation

If you can’t patch tonight, do this now.

If an immediate upgrade is not possible, disable baggage extraction by removing baggage from the configured propagation extraction styles, such as the relevant Datadog propagation style environment settings. Additionally, enforce strict HTTP header size and count limits at upstream proxies, gateways, or web servers to reject oversized baggage headers before they reach the application.

Remediation

Patch, then assume compromise.

Upgrade dd-trace-rb, including the Datadog Ruby gem datadog, to version 2.32.0 or later, which enforces limits during baggage extraction.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

DatadogDatadogapplication

DatadogDd-Trace-Rbapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

1 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity