No exploitation reportedFix available

CVE-2024-2653

Q: Is CVE-2024-2653 actively exploited?

Active exploitation of CVE-2024-2653 has not been confirmed. Its EPSS score was 83.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2024-2653?

CVE-2024-2653 has a CVSS v3 base score of 8.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.

No exploitation reported by the sources we read.

Published2024-04-03

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

amphp/http will collect CONTINUATION frames in an unbounded buffer and will not check a limit until it has received the set END_HEADERS flag, resulting in an OOM crash.

Timeline

dates in UTC

2024-04-0318:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-2653?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-2653?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

CISA-ADP · OSV

Amphp http

Branch	Affected	Fixed in	Source
2.x	≥ 2.0.0-beta1, ≤ 2.1.0	no fix published	CISA-ADP
1.x	≥ v1.6.0-rc1, ≤ 1.7.2	no fix published	CISA-ADP

amphp/http

Branch	Affected	Fixed in	Source
2.x	≥ 2.0.0, < 2.1.1	2.1.1	OSV
1.7	< 1.7.3	1.7.3	OSV

Amphp http-client

Branch	Affected	Fixed in	Source
4.0	≥ v4.0.0-rc10, ≤ 4.0.0	no fix published	CISA-ADP

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2024-09-06
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.18.22024-09-06
FIRST EPSSEPSS score83.4 %read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Published: 2024-04-03
Last Modified: 2026-06-17
NVD status: Deferred

Frequently asked questions

What is CVE-2024-2653?

amphp/http will collect CONTINUATION frames in an unbounded buffer and will not check a limit until it has received the set END_HEADERS flag, resulting in an OOM crash.

Is CVE-2024-2653 actively exploited?

Active exploitation of CVE-2024-2653 has not been confirmed. Its EPSS score was 83.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-2653?

CVE-2024-2653 has a CVSS v3 base score of 8.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.

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