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CVE-2026-48913: Apache HTTP Server: mod_http2 memory corruption when file handles exhausted

highCVSS 7.3CVE-2026-48913

CSIRTS triage

vendor: Apacheproduct: Apache HTTP ServerMemory corruption
What
A memory corruption issue occurs when file handles are exhausted in mod_http2.
Who is affected
Deployments of Apache HTTP Server using mod_http2 are affected.
Urgency
This vulnerability is rated high with a CVSS score of 7.3, indicating a significant risk.
Action
Apply the latest patches for Apache HTTP Server to resolve this issue.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7.3
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48913

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-48913coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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