CVE-2026-92392: HTTP/2 upload Use-After-Free

CVE-2026-92392 PUBLISHED CVSS 8.1 HIGH

HTTP/2 upload Use-After-Free

Reported by curl · Published October 14, 2026

During 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.

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

Package	Ecosystem	Fixed in
libcurl-minimal	Amazon Linux	8.21.0-5.amzn2023.0.3
curl	Amazon Linux	8.21.0-5.amzn2023.0.3
libcurl-devel	Amazon Linux	8.21.0-5.amzn2023.0.3
libcurl	Amazon Linux	8.21.0-5.amzn2023.0.3
curl-minimal	Amazon Linux	8.21.0-5.amzn2023.0.3
curl	Chainguard	8.23.0-r0
curl	Alpine	8.23.0-r0, 8.14.1-r4, 8.14.1-r3
curl	Wolfi	8.23.0-r0
curl	curl	8.22.0, 8.21.0, 8.20.0, 8.19.0, 8.18.0, 8.17.0, 8.16.0, 8.15.0, 8.14.1, 8.14.0, 8.13.0, 8.12.1, 8.12.0

Risk scores

CVSS 3.1

8.1

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

Affected products

Vendor	Product	Versions
curl	curl	8.22.0, 8.21.0, 8.20.0
amazon:2023	libcurl-minimal	0
amazon:2023	curl	0
amazon:2023	libcurl-devel	0
amazon:2023	libcurl	0
amazon:2023	curl-minimal	0
chainguard	curl	0
curl	curl	8.12.0, 8.14.1, 8.14.0
alpine	curl	0, 0, 0
wolfi	curl	0

Timeline

Oct 14, 2026 EPSS Score (9 in total, the first dated here)
Oct 14, 2026 Coalition ESS Score
Oct 14, 2026 PoC Published
Oct 14, 2026 CVE Published
Oct 15, 2026 Security Advisory

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln CVE-2026-92392
vulnetix vdb fixes CVE-2026-92392

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-92392/fixes/registry"

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References

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