CVE-2026-11352

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-03. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
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

A fix is available — apply it.

An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server to trigger a remote denial of service against a curl or libcurl client. Because the helper function discards zero-length UDP datagrams before counting them toward the per-call packet budget, a connected QUIC peer can continuously stream empty datagrams to indefinitely stall the client.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
—
EPSS
59.5%
KEV
Not listed

Published

July 3, 2026

Last Modified

July 7, 2026

Advisory Details (3)

Auto-updated Jul 7, 2026
No patch confirmed yet.
generic

HackerOne

https://hackerone.com/reports/3783438
generic
https://curl.se/docs/CVE-2026-11352.json
generic

curl - QUIC zero-length UDP datagrams busy-loop - CVE-2026-11352

https://curl.se/docs/CVE-2026-11352.html

Vendor Advisories for CVE-2026-11352(3)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibcurl4-openssl-dev (7.58.0-2ubuntu3.24+esm10) @ bionic2026-07-16ubuntu
redhatrust-main-1.96.1-1.hum12026-07-02redhat
redhatcurl-main-8.21.0-0.1.hum12026-06-24redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 60× 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. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:24 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:30 UTCEPSS rescore
  5. 2026-07-19 02:28 UTCEPSS rescore
  6. 2026-07-18 10:04 UTCEPSS rescore
  7. 2026-07-17 03:40 UTCVendor advisory
  8. 2026-07-17 03:40 UTCGHSA enrichment
  9. 2026-07-16 17:02 UTCEPSS rescore
  10. 2026-07-16 16:18 UTCVendor advisory
  11. 2026-07-16 16:18 UTCGHSA enrichment
  12. 2026-07-16 04:55 UTCVendor advisory
  13. 2026-07-16 04:55 UTCGHSA enrichment
  14. 2026-07-15 17:32 UTCVendor advisory
  15. 2026-07-15 17:32 UTCGHSA enrichment
  16. 2026-07-15 16:57 UTCEPSS rescore
  17. 2026-07-15 06:03 UTCVendor advisory
  18. 2026-07-15 06:03 UTCGHSA enrichment
  19. 2026-07-15 02:00 UTCEPSS rescore
  20. 2026-07-14 18:30 UTCVendor advisory
  21. 2026-07-14 18:30 UTCGHSA enrichment
  22. 2026-07-14 07:08 UTCVendor advisory
  23. 2026-07-14 07:08 UTCGHSA enrichment
  24. 2026-07-13 22:30 UTCEPSS rescore
  25. 2026-07-13 19:43 UTCVendor advisory
Show 35 more
  1. 2026-07-13 19:43 UTCGHSA enrichment
  2. 2026-07-13 08:20 UTCVendor advisory
  3. 2026-07-13 08:20 UTCGHSA enrichment
  4. 2026-07-13 06:12 UTCEPSS rescore
  5. 2026-07-12 20:56 UTCVendor advisory
  6. 2026-07-12 20:56 UTCGHSA enrichment
  7. 2026-07-12 09:27 UTCVendor advisory
  8. 2026-07-12 09:27 UTCGHSA enrichment
  9. 2026-07-12 05:46 UTCEPSS rescore
  10. 2026-07-11 22:04 UTCVendor advisory
  11. 2026-07-11 22:04 UTCGHSA enrichment
  12. 2026-07-11 10:42 UTCVendor advisory
  13. 2026-07-11 10:42 UTCGHSA enrichment
  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-10 23:20 UTCVendor advisory
  16. 2026-07-10 23:20 UTCGHSA enrichment
  17. 2026-07-10 11:58 UTCVendor advisory
  18. 2026-07-10 11:58 UTCGHSA enrichment
  19. 2026-07-10 00:34 UTCVendor advisory
  20. 2026-07-10 00:34 UTCGHSA enrichment
  21. 2026-07-09 19:10 UTCEPSS rescore
  22. 2026-07-09 13:11 UTCEG score recompute▲ 7.50
  23. 2026-07-09 13:11 UTCVendor advisory
  24. 2026-07-09 13:11 UTCGHSA enrichment
  25. 2026-07-08 15:15 UTCEPSS rescore
  26. 2026-07-08 15:15 UTCEPSS rescore
  27. 2026-07-07 13:46 UTCEPSS rescore
  28. 2026-07-06 19:06 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  29. 2026-07-06 16:27 UTCEPSS rescore
  30. 2026-07-06 10:55 UTCGHSA enrichment
  31. 2026-07-06 02:23 UTCEPSS rescore
  32. 2026-07-05 02:30 UTCEPSS rescore
  33. 2026-07-05 02:30 UTCEPSS rescore
  34. 2026-07-03 08:28 UTCEG score recompute
  35. 2026-07-03 08:26 UTCNVD updatefirst tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-11352?
CVE-2026-11352 is a high vulnerability published on July 3, 2026. An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server to trigger a remote denial of service against a curl or libcurl client. Because the helper function discards zero-length UDP datagrams before counting them toward the per-call packet budget, a connected QUIC peer can…
When was CVE-2026-11352 disclosed?
CVE-2026-11352 was first published in the National Vulnerability Database on July 3, 2026, with the most recent update on July 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-11352 actively exploited?
CVE-2026-11352 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 59.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-11352?
CVE-2026-11352 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-11352?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11352, 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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