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CVE-2026-8458

wrong reuse for different services

Published: Jul 3, 2026Updated: Jul 7, 2026 Sources: CVE List NVDNVD-CWE-noinfo
6.5MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 76.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

libcurl might in some circumstances reuse the wrong connection when asked to do Negotiate-authenticated ones, even when they are set to use different 'services'. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When reusing a connection a range of criteria must be met. Due to a logical error in the code, a request that was issued by an application could wrongfully reuse an existing connection to the same server that was authenticated using different services.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

NVD-CWE-noinfo

Affected Products

haxx
oss-project·SEaka haxx.se
curl
OSS Libraries
curl
oss-project·USaka libcurl, wcurl
curlLibraryLibrary
OSS Libraries / generic-library

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-8458?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://curl.se/docs/CVE-2026-8458.html
curl.se
https://curl.se/docs/CVE-2026-8458.json
curl.se
https://hackerone.com/reports/3721183
hackerone.com
News mentions
1

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