CVE-2026-50271

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.8%, top 47% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Datadog dd-trace-py is the Datadog Python APM client. Prior to 4.8.2, Datadog tracing libraries that implement W3C baggage propagation parse incoming baggage HTTP headers without enforcing DD_TRACE_BAGGAGE_MAX_ITEMS or DD_TRACE_BAGGAGE_MAX_BYTES limits on the extract path. A remote, unauthenticated attacker can send a request whose baggage header contains an arbitrarily large number of comma-separated key-value pairs or a single very large value, causing unbounded CPU and memory consumption and enabling a remote denial of service against HTTP services with baggage propagation enabled. This issue is fixed in version 4.8.2.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
52.5%
KEV
Not listed

Published

July 15, 2026

Last Modified

July 23, 2026

Advisory Details (4)

Auto-updated Jul 17, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available

Improper parsing of W3C baggage headers may lead to DoS · Advisory · DataDog/dd-trace-py · GitHub

https://github.com/DataDog/dd-trace-py/security/advisories/GHSA-mw54-j2v2-42hr
github_release Patch Available

4.8.2

Patch available: DataDog/dd-trace-py v4.8.2

https://github.com/DataDog/dd-trace-py/releases/tag/v4.8.2
github_pr Patch Available

fix: limit baggage header extraction [backport 4.8]

Patch available: DataDog/dd-trace-py v4.8.8 (PR #17926 merged 2026-05-06)

https://github.com/DataDog/dd-trace-py/pull/17926
github_commit Patch Available

commit 9c80faa3dcfe (DataDog/dd-trace-py)

Patch available: DataDog/dd-trace-py v4.8.8 (contains commit 9c80faa3dcfe)

https://github.com/DataDog/dd-trace-py/commit/9c80faa3dcfe238d008c3b3cd0b8e5dfef0aa4cd

Vendor Advisories for CVE-2026-50271(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
ddtrace0.10.0 ... 4.8.1 (774 versions)4.8.2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 10× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 03:18 UTCEG score recompute
  3. 2026-07-22 14:08 UTCEPSS rescore
  4. 2026-07-21 15:25 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 14:31 UTCEPSS rescore
  8. 2026-07-19 02:36 UTCEG score recompute
  9. 2026-07-19 02:29 UTCEPSS rescore
  10. 2026-07-15 23:19 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-50271?
CVE-2026-50271 is a high vulnerability published on July 15, 2026. Datadog dd-trace-py is the Datadog Python APM client. Prior to 4.8.2, Datadog tracing libraries that implement W3C baggage propagation parse incoming baggage HTTP headers without enforcing DDTRACEBAGGAGEMAXITEMS or DDTRACEBAGGAGEMAXBYTES limits on the extract path. A remote, unauthenticated…
When was CVE-2026-50271 disclosed?
CVE-2026-50271 was first published in the National Vulnerability Database on July 15, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50271 actively exploited?
CVE-2026-50271 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 52.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-50271?
CVE-2026-50271 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-50271?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50271, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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