CVE-2026-11352

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM 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 — 4 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: Elevated riskExposed: 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(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
52%
KEV
Not listed

Published

July 3, 2026

Last Modified

September 15, 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 (7.68.0-1ubuntu2.25+esm5) @ focal2026-09-18ubuntu
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.

Affected Packages

(3 across 3 ecosystems)
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
curl—8.22.0-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
curl—8.21.0-r0—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
curl8.14.1-2 ... 8.21.0~rc1-1+exp1 (59 versions)8.21.0~rc2-1—

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 17× in last 7d / 81× 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.

Showing the most recent 100 of 297 total refreshes for this CVE.

  1. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-18 06:13 UTCEG score recompute
  3. 2026-09-18 06:13 UTCVendor advisory
  4. 2026-09-18 06:13 UTCGHSA enrichment
  5. 2026-09-16 05:14 UTCEPSS rescore
  6. 2026-09-15 07:26 UTCVendor advisory
  7. 2026-09-15 07:26 UTCGHSA enrichment
  8. 2026-09-15 06:39 UTCEG score recompute
  9. 2026-09-15 06:39 UTCVendor advisory
  10. 2026-09-15 06:39 UTCGHSA enrichment
  11. 2026-09-14 00:05 UTCEG score recompute
  12. 2026-09-14 00:05 UTCVendor advisory
  13. 2026-09-14 00:05 UTCGHSA enrichment
  14. 2026-09-13 16:46 UTCEPSS rescore
  15. 2026-09-13 08:58 UTCEG score recompute
  16. 2026-09-13 08:58 UTCVendor advisory
  17. 2026-09-13 08:58 UTCGHSA enrichment
  18. 2026-09-12 15:00 UTCEPSS rescore
  19. 2026-09-12 14:06 UTCEG score recompute
  20. 2026-09-12 14:06 UTCVendor advisory
  21. 2026-09-12 14:06 UTCGHSA enrichment
  22. 2026-09-11 14:52 UTCEPSS rescore
  23. 2026-09-11 09:36 UTCEPSS rescore
  24. 2026-09-10 09:34 UTCEPSS rescore
  25. 2026-09-08 22:00 UTCEPSS rescore
Show 75 more
  1. 2026-09-07 16:01 UTCEPSS rescore
  2. 2026-09-06 14:18 UTCEG score recompute
  3. 2026-09-06 14:18 UTCVendor advisory
  4. 2026-09-06 14:18 UTCGHSA enrichment
  5. 2026-09-06 13:47 UTCEPSS rescore
  6. 2026-09-05 23:50 UTCEG score recompute
  7. 2026-09-05 23:50 UTCVendor advisory
  8. 2026-09-05 23:50 UTCGHSA enrichment
  9. 2026-09-04 05:06 UTCEPSS rescore
  10. 2026-09-02 14:11 UTCEPSS rescore
  11. 2026-09-01 13:53 UTCEPSS rescore
  12. 2026-09-01 04:39 UTCEPSS rescore
  13. 2026-08-30 22:42 UTCEG score recompute
  14. 2026-08-30 22:42 UTCVendor advisory
  15. 2026-08-30 22:42 UTCGHSA enrichment
  16. 2026-08-30 19:17 UTCEPSS rescore
  17. 2026-08-30 11:20 UTCEG score recompute
  18. 2026-08-30 11:20 UTCVendor advisory
  19. 2026-08-30 11:20 UTCGHSA enrichment
  20. 2026-08-30 01:21 UTCEPSS rescore
  21. 2026-08-28 21:40 UTCEPSS rescore
  22. 2026-08-27 22:12 UTCEG score recompute
  23. 2026-08-27 22:12 UTCVendor advisory
  24. 2026-08-27 22:12 UTCGHSA enrichment
  25. 2026-08-27 14:24 UTCEPSS rescore
  26. 2026-08-27 03:17 UTCEG score recompute
  27. 2026-08-27 03:17 UTCVendor advisory
  28. 2026-08-27 03:17 UTCGHSA enrichment
  29. 2026-08-25 13:48 UTCEPSS rescore
  30. 2026-08-25 13:38 UTCVendor advisory
  31. 2026-08-25 13:38 UTCGHSA enrichment
  32. 2026-08-24 20:55 UTCEG score recompute
  33. 2026-08-24 20:55 UTCVendor advisory
  34. 2026-08-24 20:55 UTCGHSA enrichment
  35. 2026-08-24 05:29 UTCVendor advisory
  36. 2026-08-24 05:29 UTCGHSA enrichment
  37. 2026-08-23 18:05 UTCVendor advisory
  38. 2026-08-23 18:05 UTCGHSA enrichment
  39. 2026-08-23 06:43 UTCEG score recompute
  40. 2026-08-23 06:43 UTCVendor advisory
  41. 2026-08-23 06:43 UTCGHSA enrichment
  42. 2026-08-23 00:19 UTCEPSS rescore
  43. 2026-08-22 19:19 UTCVendor advisory
  44. 2026-08-22 19:19 UTCGHSA enrichment
  45. 2026-08-22 06:01 UTCEG score recompute
  46. 2026-08-22 06:01 UTCVendor advisory
  47. 2026-08-22 06:01 UTCGHSA enrichment
  48. 2026-08-21 23:48 UTCEPSS rescore
  49. 2026-08-21 15:48 UTCVendor advisory
  50. 2026-08-21 15:48 UTCGHSA enrichment
  51. 2026-08-21 04:26 UTCEG score recompute
  52. 2026-08-21 04:26 UTCVendor advisory
  53. 2026-08-21 04:26 UTCGHSA enrichment
  54. 2026-08-20 22:55 UTCEPSS rescore
  55. 2026-08-20 15:52 UTCVendor advisory
  56. 2026-08-20 15:52 UTCGHSA enrichment
  57. 2026-08-20 03:58 UTCEG score recompute
  58. 2026-08-20 03:58 UTCVendor advisory
  59. 2026-08-20 03:58 UTCGHSA enrichment
  60. 2026-08-19 17:03 UTCEPSS rescore
  61. 2026-08-19 08:14 UTCVendor advisory
  62. 2026-08-19 08:14 UTCGHSA enrichment
  63. 2026-08-18 20:52 UTCEG score recompute
  64. 2026-08-18 20:52 UTCVendor advisory
  65. 2026-08-18 20:52 UTCGHSA enrichment
  66. 2026-08-18 13:48 UTCEPSS rescore
  67. 2026-08-18 04:28 UTCVendor advisory
  68. 2026-08-18 04:28 UTCGHSA enrichment
  69. 2026-08-17 14:38 UTCEG score recompute
  70. 2026-08-17 14:38 UTCVendor advisory
  71. 2026-08-17 14:38 UTCGHSA enrichment
  72. 2026-08-17 03:16 UTCVendor advisory
  73. 2026-08-17 03:16 UTCGHSA enrichment
  74. 2026-08-16 15:53 UTCEG score recompute
  75. 2026-08-16 15:53 UTCVendor advisory

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 September 15, 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 1% probability of exploitation in the next 30 days, which ranks it in the top 47.8% of all scored CVEs.
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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