CVE-2026-56154

VendorapacheProducthttp serverDiscoveredOct 1, 2026UpdatedOct 5, 2026

Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...}) This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

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CVSS v3.1

9.8 CRITICAL

EPSS

0.56%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

Related IOCs

seen in the same coverage

EPSS Trend

Oct 3, 2026 → Oct 7, 2026

▲ 0.15pp

0.42% → 0.56% over 2 tracked changes

CVSS v3.1 Detail

Attack VectorNETWORK

Attack ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

ScopeUNCHANGED

ConfidentialityHIGH

IntegrityHIGH

AvailabilityHIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Connections

2 relationships

CWE-416

source

Timeline

disclosure → media coverage

Oct 1, 2026

Disclosure — published as a CVE record. · last revised by NVD Oct 5, 2026