7.5

CVE-2026-54428

Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Apache ≫ Httpcomponents Core Version <= 5.4.2
Apache ≫ Httpcomponents Core Version5.5 Updatealpha1
Apache ≫ Httpcomponents Core Version5.5 Updatebeta1
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.59% 0.438
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-400 Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource.

CWE-770 Allocation of Resources Without Limits or Throttling

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd
Vendor Advisory
Mitigation
http://www.openwall.com/lists/oss-security/2026/07/01/3
Third Party Advisory
Mitigation