HIGH 7.5
GHSA-v3jc-474w-2wm6
Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK
Quick fix
GHSA-v3jc-474w-2wm6 — org.apache.httpcomponents.core5:httpcore5-h2: upgrade to the fixed version with the command below.
# pom.xml: bump <version>5.4.3</version> for org.apache.httpcomponents.core5:httpcore5-h2Details
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.
Are you affected?
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Affected packages
Maven / org.apache.httpcomponents.core5:httpcore5-h2
Introduced in:
0 Fixed in: 5.4.3 Fix
# pom.xml: bump <version>5.4.3</version> for org.apache.httpcomponents.core5:httpcore5-h2 Maven / org.apache.httpcomponents.core5:httpcore5-h2
Introduced in:
5.5-alpha1 Fixed in: 5.5-beta2 Fix
# pom.xml: bump <version>5.5-beta2</version> for org.apache.httpcomponents.core5:httpcore5-h2 References
- https://nvd.nist.gov/vuln/detail/CVE-2026-54428 [ADVISORY]
- https://github.com/apache/httpcomponents-core/commit/1ea1239bbbe3442a8382a87279c0a8119a7e358e [WEB]
- https://github.com/apache/httpcomponents-core/commit/cc30ee058a7b10cbf4ad3dd6270ab6d1f6a74c49 [WEB]
- https://github.com/apache/httpcomponents-core [PACKAGE]
- https://lists.apache.org/thread/5zjp8vczvxq19pw2rvhs21q446bhl0sd [WEB]
- http://www.openwall.com/lists/oss-security/2026/07/01/3 [WEB]