HTTP/2 upload Use-After-Free

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-92392
StatePUBLISHED
Assignercurl
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-14 08:17:05 UTC
Updated2026-10-18 23:16:57 UTC
DescriptionDuring an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason `HTTP_1_1_REQUIRED` or `REFUSED_STREAM`) leading to a use after free of a `struct Curl_easy` object.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from ADP

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

EPSS: 0.006340000 probability, percentile 0.493360000 (date 2026-10-18)

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

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED8.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary8.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Curl Curl affected 8.22.0 8.22.0 semver Not specified
CNA Curl Curl affected 8.21.0 8.21.0 semver Not specified
CNA Curl Curl affected 8.20.0 8.20.0 semver Not specified
CNA Curl Curl affected 8.19.0 8.19.0 semver Not specified
CNA Curl Curl affected 8.18.0 8.18.0 semver Not specified
CNA Curl Curl affected 8.17.0 8.17.0 semver Not specified
CNA Curl Curl affected 8.16.0 8.16.0 semver Not specified
CNA Curl Curl affected 8.15.0 8.15.0 semver Not specified
CNA Curl Curl affected 8.14.1 8.14.1 semver Not specified
CNA Curl Curl affected 8.14.0 8.14.0 semver Not specified
CNA Curl Curl affected 8.13.0 8.13.0 semver Not specified
CNA Curl Curl affected 8.12.1 8.12.1 semver Not specified
CNA Curl Curl affected 8.12.0 8.12.0 semver Not specified

References

ReferenceSourceLinkTags
www.openwall.com/lists/oss-security/2026/10/18/5 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
hackerone.com/reports/4030333 134c704f-9b21-4f2e-91b3-4a467353bcc0 hackerone.com
curl.se/docs/CVE-2026-92392.json 2499f714-1537-4658-8207-48ae4bb9eae9 curl.se
www.openwall.com/lists/oss-security/2026/10/18/6 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
curl.se/docs/CVE-2026-92392.html 2499f714-1537-4658-8207-48ae4bb9eae9 curl.se
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: Luna with Claude (en)

CNA: Anthropic (en)

CNA: Stefan Eissing (en)

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