CVE-2023-44487

HIGHCISA KEVEPSS 100th pctl

7.5

CVSS v3

Description

The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

CWE-400Resource Exhaustion

How to fix

Remediation Available

aspnetcore-runtime-6.0Amazon

Fixed in:0:6.0.23-1.amzn2023.0.1

aspnetcore-targeting-pack-6.0Amazon

Fixed in:0:6.0.23-1.amzn2023.0.1

dotnetAmazon

Fixed in:0:6.0.123-1.amzn2023.0.1

dotnet-apphost-pack-6.0Amazon

Fixed in:0:6.0.23-1.amzn2023.0.1

dotnet-apphost-pack-6.0-debuginfoAmazon

Fixed in:0:6.0.23-1.amzn2023.0.1

dotnet-hostAmazon

Fixed in:0:6.0.23-1.amzn2023.0.1

dotnet-host-debuginfoAmazon

Fixed in:0:6.0.23-1.amzn2023.0.1

dotnet-hostfxr-6.0Amazon

Fixed in:0:6.0.23-1.amzn2023.0.1

dotnet-hostfxr-6.0-debuginfoAmazon

Fixed in:0:6.0.23-1.amzn2023.0.1

dotnet-runtime-6.0Amazon

Fixed in:0:6.0.23-1.amzn2023.0.1

dotnet-runtime-6.0-debuginfoAmazon

Fixed in:0:6.0.23-1.amzn2023.0.1

dotnet-sdk-6.0Amazon

Fixed in:0:6.0.123-1.amzn2023.0.1

dotnet-sdk-6.0-debuginfoAmazon

Fixed in:0:6.0.123-1.amzn2023.0.1

dotnet-sdk-6.0-source-built-artifactsAmazon

Fixed in:0:6.0.123-1.amzn2023.0.1

dotnet-targeting-pack-6.0Amazon

Fixed in:0:6.0.23-1.amzn2023.0.1

dotnet-templates-6.0Amazon

Fixed in:0:6.0.123-1.amzn2023.0.1

dotnet6.0-debuginfoAmazon

Fixed in:0:6.0.123-1.amzn2023.0.1

dotnet6.0-debugsourceAmazon

Fixed in:0:6.0.123-1.amzn2023.0.1

ecs-service-connect-agentAmazon

Fixed in:0:v1.27.2.0-1.amzn2023

golangAmazon

Fixed in:0:1.20.10-1.amzn2.0.1

Fixed in:0:1.20.10-1.amzn2023.0.1

golang-binAmazon

Fixed in:0:1.20.10-1.amzn2.0.1

Fixed in:0:1.20.10-1.amzn2023.0.1

golang-docsAmazon

Fixed in:0:1.20.10-1.amzn2.0.1

Fixed in:0:1.20.10-1.amzn2023.0.1

golang-miscAmazon

Fixed in:0:1.20.10-1.amzn2.0.1

Fixed in:0:1.20.10-1.amzn2023.0.1

golang-sharedAmazon

Fixed in:0:1.20.10-1.amzn2.0.1

Fixed in:0:1.20.10-1.amzn2023.0.1

golang-srcAmazon

Fixed in:0:1.20.10-1.amzn2.0.1

Fixed in:0:1.20.10-1.amzn2023.0.1

golang-testsAmazon

Fixed in:0:1.20.10-1.amzn2.0.1

Fixed in:0:1.20.10-1.amzn2023.0.1

grpcAmazon

Fixed in:0:1.60.0-10.amzn2023

grpc-cppAmazon

Fixed in:0:1.60.0-10.amzn2023

grpc-cpp-debuginfoAmazon

Fixed in:0:1.60.0-10.amzn2023

grpc-dataAmazon

Fixed in:0:1.60.0-10.amzn2023

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

100.00%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

HTTP/2 Rapid Reset Attack Vulnerability

HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Remediation due: 2023-10-31

References

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2023-21547	High	7.5	89%	-	Fix
CVE-2018-1000115	High	7.5	88%	-	Fix
CVE-2024-25617	Medium	5.3	88%	-	Fix

Common questions

How do I fix CVE-2023-44487?

Published advisories record a fix for 472 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2023-44487 being actively exploited?

Yes. CVE-2023-44487 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. US federal agencies were required to remediate it by 2023-10-31. Treat it as a priority whatever its CVSS score says.

How severe is CVE-2023-44487?

CVE-2023-44487 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2023-44487 affect?

Published advisories record a fix for aspnetcore-runtime-6.0 (Amazon), aspnetcore-targeting-pack-6.0 (Amazon), dotnet (Amazon), dotnet-apphost-pack-6.0 (Amazon), and 468 more. The list on this page is capped, so there may be more.

Embed a live status badge for CVE-2023-44487

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This vulnerability is actively exploited in the wild

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-11.