CVE-2026-73051

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 74% 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
Trending — 4 sources updated this week
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: None knownExposed: 0

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

actix-http versions before 3.12.1 contain an HTTP request smuggling vulnerability in the HTTP/1.1 parser that accepts requests with both Content-Length and Transfer-Encoding: chunked headers. Unauthenticated remote attackers can exploit this through a front-end intermediary to desynchronize backend requests and smuggle malicious HTTP requests to the Actix service.

CVSS v3
6.3
EG Score
6.3(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity63% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

August 14, 2026

Last Modified

August 14, 2026

Advisory Details (2)

Auto-updated Aug 14, 2026
Patch available. Sources: github.
generic

actix-http before 3.12.1 HTTP Request Smuggling via CL.TE | Advisories | VulnCheck

https://www.vulncheck.com/advisories/actix-http-before-http-request-smuggling-via-cl-te
github Patch Available

HTTP/1.1 CL.TE Request Smuggling In `actix-http` · Advisory · actix/actix-web · GitHub

https://github.com/actix/actix-web/security/advisories/GHSA-xhj4-vrgc-hr34

Vendor Advisories for CVE-2026-73051(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)
crates.io(1)
PackageVulnerable rangeFixed inDependents
actix-http—3.12.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 25× in last 7d / 25× 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. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 14:54 UTCEG score recompute
  3. 2026-08-20 14:53 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 14:54 UTCGHSA enrichment
  6. 2026-08-18 14:58 UTCEG score recompute
  7. 2026-08-18 14:58 UTCGHSA enrichment
  8. 2026-08-18 13:49 UTCEPSS rescore
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-17 14:17 UTCEG score recompute
  11. 2026-08-17 14:17 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 14:21 UTCEG score recompute
  16. 2026-08-16 14:21 UTCGHSA enrichment
  17. 2026-08-16 02:15 UTCEPSS rescore
  18. 2026-08-15 14:25 UTCGHSA enrichment
  19. 2026-08-14 14:28 UTCEG score recompute
  20. 2026-08-14 14:28 UTCGHSA enrichment
  21. 2026-08-14 14:14 UTCEG score recompute
  22. 2026-08-14 14:14 UTCGHSA enrichment
  23. 2026-08-14 12:22 UTCEG score recompute
  24. 2026-08-14 11:49 UTCEG score recompute
  25. 2026-08-14 11:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-73051?
CVE-2026-73051 is a medium vulnerability published on August 14, 2026. actix-http versions before 3.12.1 contain an HTTP request smuggling vulnerability in the HTTP/1.1 parser that accepts requests with both Content-Length and Transfer-Encoding: chunked headers. Unauthenticated remote attackers can exploit this through a front-end intermediary to desynchronize backend…
When was CVE-2026-73051 disclosed?
CVE-2026-73051 was first published in the National Vulnerability Database on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73051 actively exploited?
CVE-2026-73051 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 73.5% of all scored CVEs.
What is the CVSS score of CVE-2026-73051?
CVE-2026-73051 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-73051?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73051, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-73051

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