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CVE-2024-30156

HIGH
7.5
CVSS Score
Published: March 24, 2024 at 12:00 AM UTC
Updated: June 17, 2026 at 07:26 AM UTC
2 products affected across 1 vendorCacheEnterprise

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Severity
HIGH7.5
Exploit prediction
EPSS 4%
SSVC
No known exploit

Description

Varnish Cache before 7.3.2 and 7.4.x before 7.4.3 (and before 6.0.13 LTS), and Varnish Enterprise 6 before 6.0.12r6, allows credits exhaustion for an HTTP/2 connection control flow window, aka a Broke Window Attack.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Cache· Varnish Software
90%
v < 6.0.13v < 7.3.27.4 ≤ v < 7.4.3
Enterprise· Varnish Software
90%
v < 6.0.12r6

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: [email protected]
https://varnish-cache.org/docs/7.5/whats-new/changes-7.5.html#security
Source: [email protected]
https://varnish-cache.org/security/VSV00014.html

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-770

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