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Curl CVE-2026-11586

| EUVDEUVD-2026-41500 HIGH
Allocation of Resources Without Limits or Throttling (CWE-770)
7.5
CVSS 3.1 · Vendor
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Severity by source

Vendor (CNA) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
6.5 MEDIUM

Network vector as server sends PINGs over WebSocket; UI:R because user must initiate the connection; A:H for memory exhaustion DoS; no confidentiality or integrity impact.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
HIGH
qualitative
Red Hat
7.5 HIGH
qualitative

Primary rating from Vendor (CNA).

CVSS VectorVendor

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

5
Analysis Updated
Jul 06, 2026 - 16:29 vuln.today
v3 (cvss_changed)
Analysis Updated
Jul 06, 2026 - 16:28 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Jul 06, 2026 - 16:22 vuln.today
cvss_changed
CVSS changed
Jul 06, 2026 - 16:22 NVD
7.5 (HIGH)
Analysis Generated
Jun 24, 2026 - 18:29 vuln.today

Description PRE-NVD

Disclosed via oss-security. NVD scoring and full description are pending.

AnalysisAI

Denial of service in curl 8.16.0 through 8.20.0 lets a malicious WebSocket server exhaust all client memory by flooding it with rapid, sequential PING frames. Because curl auto-responds to PINGs by default and imposes no upper bound on memory buffered for unacknowledged frames, the queue of pending PONG responses grows unbounded until the process is OOM-killed. …

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Recommended ActionAI

24 hours: Identify all systems running curl versions 8.16.0-8.20.0 with WebSocket support enabled. …

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SLES15-SP5-CHOST-BYOS-SAP-CCloud Not-Affected
SLES15-SP6-CHOST-BYOS Not-Affected
SLES15-SP6-CHOST-BYOS-Aliyun Not-Affected
SLES15-SP6-CHOST-BYOS-Azure Not-Affected
SLES15-SP6-CHOST-BYOS-EC2 Not-Affected

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CVE-2026-11586 vulnerability details – vuln.today

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