CVE-2020-11080

mediumpriority · track · 32EPSS 0.053 · 93 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

5.32% (93rd) EPSS

CVSS 5 · medium

Is it mine?

58 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

Mitigatione-mesh EMScisa_csaf_ot
Do not directly connect to the Internet.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3.7–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · security-advisories@github.comexploitability 2.2 · impact 1.4

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USprimaryCWE-400USCWE-707USCWE-707US

affected products (58)

Products and version ranges known to be affected.

IBM InfoSphere Information Serverall versionscert_bundDEcpe:/a:ibm:infosphere_information_server:-
IBM QRadar SIEM 7.3all versionscert_bundDEcpe:/a:ibm:qradar_siem:7.3
IBM QRadar SIEM 7.4all versionscert_bundDEcpe:/a:ibm:qradar_siem:7.4
IBM QRadar SIEM 7.5.0all versionscert_bundDEcpe:/a:ibm:qradar_siem:7.5.0
e-mesh EMS: Version 1.0all versionscisa_csaf_otUS
Hitachi Energy e-mesh EMSall versionscisa_csaf_otUS
nghttp2 nghttp2≤ < 1.41.0enisa_euvdEU
Fedora Project Fedora≤ 33fstec_bduRU
Fedora Project Fedora≤ 31fstec_bduRU
Novell Inc. OpenSUSE Leap≤ 15.1fstec_bduRU
Oracle Corp. Enterprise Communications Broker≤ 3.2fstec_bduRU
Oracle Corp. Enterprise Communications Broker≤ 3.1fstec_bduRU
Oracle Corp. GraalVM Enterprise Edition≤ 20.1.0fstec_bduRU
Oracle Corp. GraalVM Enterprise Edition≤ 19.3.2fstec_bduRU
Oracle Corp. MySQL Cluster≤ 7.3.30fstec_bduRU
Oracle Corp. MySQL Cluster≤ 8.0.21fstec_bduRU
Oracle Corp. MySQL Cluster≤ 7.6.15fstec_bduRU
Oracle Corp. MySQL Cluster≤ 7.5.19fstec_bduRU
Oracle Corp. MySQL Cluster≤ 7.4.29fstec_bduRU
Oracle Corp. Oracle Enterprise Session Border Controller≤ 8.3fstec_bduRU

showing 20 of 58

advisories (6)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1374Node.js: Mehrere SchwachstellenDeutsch2020-06-07csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Node.js ausnutzen, um beliebigen Programmcode auszuführen, einen Denial of Service Angriff durchzuführen, Sicherheitsmechanismen zu umgehen oder seine Privilegien zu erweitern.
WID-SEC-W-2025-0227IBM QRadar SIEM: Mehrere SchwachstellenDeutsch2021-11-30csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um seine Privilegien zu erweitern, Administratorrechte zu erlangen, beliebigen Programmcode auszuführen, Informationen offenzulegen, Dateien zu manipulieren oder Sicherheitsvorkehrungen zu umgehen.
WID-SEC-W-2026-0205Oracle MySQL: Mehrere SchwachstellenDeutsch2020-10-20csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle MySQL ausnutzen, um die Verfügbarkeit, Vertraulichkeit und Integrität zu gefährden.
ICSA-22-090-02Hitachi Energy e-mesh EMS2022-03-31icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could cause a denial-of-service condition.
BIT-node-2020-11080Denial of service in nghttp22024-03-06vendor · osvUS
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.
BIT-node-min-2020-11080Denial of service in nghttp22024-12-16vendor · osvUS
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.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv cert_bund cisa_csaf_ot NVD CVE.org MITRE

published 2020-06-03modified 2026-06-17

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+9607 more

references (91)

External citations — patches, advisories, analysis.

scry

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