🛡️ JLSEC-2026-1199 — curl-jll (CVE-2026-11564)

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse...

libcurl keeps previously used connections in a connection pool for subsequent

transfers to reuse if one of them matches the setup.

An easy handle that first uses default native CA trust can continue trusting

the native platform store after the application switches that same handle to

custom CA material for a later transfer.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability none.

Affected software

JLSEC-2026-1199 is recorded against 2 packages.

  • curl-jll
  • libcurl-jll

Timeline and source

Published on 7 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

curl.se (Web)
curl.se (Web)
github.com (Web)
hackerone.com (Web)
nvd.nist.gov (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-08-07
Updated 2026-08-12
Modified 2026-08-07
Fix URL N/A

Affected Packages

Software From version Fixed in
curl-jll — —
libcurl-jll — —

Similar Threats

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