HighFix available
nghttp2, nodejs — security advisory
In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.
- Products
- nghttp2, nodejs
- Affected versions
- Not specified
- Fixed versions
- 1.41.0-1, 10.21.0~dfsg-1
- CVEs
- CVE-2020-11080
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:56 UTC · Revision 1
Source evidence
In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.
osv:DEBIAN-CVE-2020-11080
nghttp2
Fixed versions: 1.41.0-1
nghttp2
Fixed versions: 1.41.0-1
nghttp2
Fixed versions: 1.41.0-1
nodejs
Fixed versions: 10.21.0~dfsg-1
nodejs
Fixed versions: 10.21.0~dfsg-1
nodejs
Fixed versions: 10.21.0~dfsg-1
Complete source record
{
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"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2020-11080",
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"summary": "In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.",
"evidence": "osv:DEBIAN-CVE-2020-11080",
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"modified": "2026-10-26T12:01:19.785337849Z",
"provider": "osv",
"upstream": [
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
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"source_id": "core-osv",
"document_id": 451572,
"published_at": "2020-06-03T23:15:11.073+00:00"
}