CVE-2026-48913Network attack vector

Memory corruption via exhausted-handle use-after-free

Published Jun 8, 2026 · Updated Jun 8, 2026

Use-after-free in Apache HTTP Server mod_http2 2.4.55 through 2.4.67 allows remote attackers to corrupt process memory via HTTP/2 traffic. When file handles are exhausted, mod_http2 accesses memory after its lifetime ends; Apache has not disclosed the affected function or object. The flaw requires HTTP/2 to be enabled and file handles to already be exhausted, and the published impact is memory corruption.

CVSS severity7.3
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Apache HTTP Server mod_http2 2.4.55 through 2.4.67 allows remote attackers to corrupt process memory via HTTP/2 traffic. When file handles are exhausted, mod_http2 accesses memory after its lifetime ends; Apache has not disclosed the affected function or object. The flaw requires HTTP/2 to be enabled and file handles to already be exhausted, and the published impact is memory corruption.

The record

CVE
CVE-2026-48913
Published
Jun 8, 2026
Updated
Jun 8, 2026
Vendor
The Apache Software Foundation
Product
Apache HTTP Server
Classifications
CWE-416, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.4.55 <=2.4.67

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache HTTP Serverversion=2.4.55 <=2.4.67

Published CVSS scores

7.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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