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CVE-2026-54399: httpcomponents core from 5.0 (inclusive), through 5.4.2 (inclusive), 5.5 · update alpha1, 5.5 · update beta1; +1 more…
CVE-2026-54399. CVSS 3.1 base score 7.5 (HIGH, Source advisory). EPSS 0.00779 (percentile 0.55481), scored 24-Oct-2026.
Affected technology
httpcomponents core · from 5.0 (inclusive), through 5.4.2 (inclusive)
apache
httpcomponents core · 5.5 · update alpha1
apache
httpcomponents core · 5.5 · update beta1
apache
Apache HttpComponents Core · 5.5-alpha through 5.5-beta1, 5.0-alpha through 5.4.2
Apache Software Foundation
Component: Not specified by the source
Attack conditions (Source advisory, CVSS 3.1): Network (remote) · No privileges required · No user interaction required
What an attacker can do
An remote attacker can cause a denial of service through memory exhaustion by sending messages with excessive number of headers / excessive header length. Source advisory’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality and integrity impact as none; availability impact as high.
- CWE
- CWE-400
- CCR priority
- 30.2 /100 (P4)
- CVSS 3.1
- 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · Source advisory
- EPSS
- 0.00779 · percentile 0.55624 · 2026-10-25
- KEV
- no
Provenance
- FIRST EPSS daily exploit-probability · Source record · observed 2026-10-25 19:52:47.952465+00:00 UTC
- NVD CVE API 2.0 · Source record · observed 2026-10-25 19:51:06.643138+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2026-54399.html