VulnSocial

CVE-2026-54428Disclosure(apache / httpcomponents_core)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch apache httpcomponents_core systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of service through memory exhaustion by sending oversized compressed header blocks before the HTTP/2 SETTINGS acknowledgement causes the configured header list size limit to be applied.

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0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-400CWE-770

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • httpcomponents_core

Threat summary

  • Patch or workaround signal is available
  • 4 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 4 signals
  • Disclosure: 2 classified signals
  • General: 1 classified signal
  • Peaked 2d ago at 2 mentions (2026-07-01); latest day: 1
  • 4 total mentions across 3 days

Affected systems

Vendors
apache
Products
httpcomponents_core

1 version affected across 1 product

Deep dive

Activity timeline4 mentions / 3d
01122Mentions · 2026-07-01: 2Mentions · 2026-07-02: 1Mentions · 2026-07-05: 1Patch / Workaround · 2026-07-02: 1Technical Details · 2026-07-01: 2Technical Details · 2026-07-02: 1Technical Details · 2026-07-05: 107-0107-0207-05
Signal classification3 categories
Disclosure
250.0%
General
125.0%
Patch
125.0%
Referenced assets5 URLs
Classification over time
DateTotalLabels
2026-07-012
Disclosure1General1
2026-07-021
Patch1
2026-07-051
Disclosure1
Full discourse4 posts
  • Daily CyberSecurity@the_yellow_fall
    Patch

    Apache HttpComponents Core vulnerabilities CVE-2026-54399 and CVE-2026-54428 allow remote denial of service through memory exhaustion. Upgrade now. #Apache #HttpComponents #DoS #CVE202654399 #CyberSecurity http://securityonline.info/apache-httpcomponents-core-dos/

    Post summary

    The advisory announces that CVE‑2026‑54399 and CVE‑2026‑54428 in Apache HttpComponents Core enable remote DoS via memory exhaustion, and urges users to upgrade to apply the available patch.

    01020486
    12.5K followersView on X
  • Open Source Security mailing list@oss_security
    Disclosure

    Apache HttpComponents Core CVE-2026-54428:: HPackDecoder Unlimited Header List Size Before SETTINGS ACK https://www.openwall.com/lists/oss-security/2026/07/01/3 CVE-2026-54399: Unbounded HTTP Header/Line Length in Default Configuration https://www.openwall.com/lists/oss-security/2026/07/01/4 Both are "Severity: important"

    Post summary

    The note announces two new CVEs (CVE-2026-54428 and CVE-2026-54399) affecting Apache HttpComponents Core, detailing header size and line length issues respectively, and labels them as important; no exploits or patches are discussed.

    00020408
    4.7K followersView on X
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-54428 Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an re… https://www.cve.org/CVERecord?id=CVE-2026-54428 ----- Traducción: CVE-2026-54428 Asi… http://infoflow.cloud`

    Post summary

    The tweet announces CVE-2026-54428, describing a resource‑allocation flaw in Apache HttpComponents Core, and provides a link to the CVE record but no PoC, exploit, patch, or evidence of active exploitation.

    0000032
    90 followersView on X
  • CVE@CVEnew
    General

    CVE-2026-54428 Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an re… https://www.cve.org/CVERecord?id=CVE-2026-54428

    Post summary

    A brief note links to the CVE record describing a resource allocation flaw, without discussing PoC, exploit, or mitigation details.

    00000804
    57.7K followersView on X
CPE platform detail3 entries

3 of 3 entries

PartVendorProductVersionTarget SWTarget HW
Appapachehttpcomponents_core---
Appapachehttpcomponents_core5.5--
Appapachehttpcomponents_core5.5--

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