SB2026082579 - Multiple vulnerabilities in Apache HttpComponents

Description

This security bulletin contains information about 2 vulnerabilities.

1) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-54428)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to allocation of resources without limits or throttling in the HTTP/2 HPACK decoder when processing compressed header blocks before the HTTP/2 SETTINGS acknowledgement. A remote attacker can send oversized compressed header blocks to cause a denial of service.

The issue can lead to memory exhaustion before the configured header list size limit is applied.

2) Resource exhaustion (CVE-ID: CVE-2026-54399)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in the HTTP/1.1 message parser when processing messages with an excessive number of headers or excessive header length. A remote attacker can send a specially crafted HTTP message to cause a denial of service.

The issue leads to memory exhaustion.

Remediation

Install update from vendor's website.

References

• https://lists.apache.org/api/email.lua?id=5zjp8vczvxq19pw2rvhs21q446bhl0sd
• https://hc.apache.org/
• https://lists.apache.org/api/email.lua?id=zmxh1pl2zohov5ntdh4lt85gfrlchgpy