OpenSSL provider use-after-free

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80229
StatePUBLISHED
Assignercurl
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-06 18:17:22 UTC
Updated2026-09-15 07:16:30 UTC
DescriptionWhen performing transfers via libcurl’s multi interface, pooled TLS connections can outlive their originating easy handles. In OpenSSL 3 provider configurations, libcurl attaches an allocated library context to the easy handle's state and passes it to OpenSSL without acquiring an ownership reference; destroying the easy handle prematurely frees this context while the active connection retains a dangling pointer, leading to a heap-use-after-free upon subsequent I/O or post-handshake operations.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.008990000 probability, percentile 0.577410000 (date 2026-09-15)

Problem Types: CWE-416 | CWE-416 Use After Free | CWE-416 CWE-416 Use After Free

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Haxx Curl All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Curl Curl affected 8.14.0 8.14.2 semver Not specified
CNA Curl Curl affected 8.15.0 8.16.1 semver Not specified
CNA Curl Curl affected 8.17.0 8.20.1 semver Not specified
CNA Curl Curl affected 8.21.0 8.22.0 semver Not specified
CNA Curl Curl affected f2ce6c46b9dcc46ced0ce43fa95176ea7599a854 7ea37abc6ac0120ba5f6d94be8d196f7cf1506bb git Not specified
CNA Curl Curl affected 8.21.0 Not specified
CNA Curl Curl affected 8.20.0 Not specified
CNA Curl Curl affected 8.19.0 Not specified
CNA Curl Curl affected 8.18.0 Not specified
CNA Curl Curl affected 8.17.0 Not specified
CNA Curl Curl affected 8.16.0 Not specified
CNA Curl Curl affected 8.15.0 Not specified
CNA Curl Curl affected 8.14.1 Not specified
CNA Curl Curl affected 8.14.0 Not specified

References

ReferenceSourceLinkTags
curl.se/docs/CVE-2026-80229.json 2499f714-1537-4658-8207-48ae4bb9eae9 curl.se Vendor Advisory
hackerone.com/reports/3969255 2499f714-1537-4658-8207-48ae4bb9eae9 hackerone.com Exploit, Mitigation, Third Party Advisory
curl.se/docs/CVE-2026-80229.html 2499f714-1537-4658-8207-48ae4bb9eae9 curl.se Patch, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Stanislav Fort (Aisle Research) (en)

CNA: Daniel Stenberg (en)

© CVE.report 2026

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