CVE-2024-30156

HIGHNVD 7.57.5—

7.5

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.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 21.9%
KEV: Not listed

Published

March 24, 2024

Last Modified

April 15, 2026

References (4)

cve@mitrehttps://varnish-cache.org/docs/7.5/whats-new/changes-7.5.html#security
cve@mitrehttps://varnish-cache.org/security/VSV00014.html
af854a3a-2127-422b-91ae-364da2661108https://varnish-cache.org/docs/7.5/whats-new/changes-7.5.html#security
af854a3a-2127-422b-91ae-364da2661108https://varnish-cache.org/security/VSV00014.html

Patch Availability(9)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	varnish:6-8020020240528095801.4cda2c84	2024-07-31	redhat
redhat	varnish:6-8060020240520091547.ad008a3a	2024-05-28	redhat
redhat	varnish:6-8080020240510134818.63b34585	2024-05-23	redhat
redhat	varnish:6-8040020240513125037.522a0ee4	2024-05-21	redhat
redhat	varnish-0:6.6.2-3.el9_2.2	2024-05-13	redhat
redhat	varnish-0:6.6.2-2.el9_0.3	2024-05-06	redhat
redhat	rh-varnish6-varnish-modules-0:0.15.0-8.el7	2024-04-08	redhat
redhat	varnish-0:6.6.2-4.el9_3.1	2024-04-08	redhat
redhat	varnish:6-8090020240328195416.a75119d5	2024-04-08	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-770Allocation of Resources Without Limits or Throttling

All Vendor Advisories

(9)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 14× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:11 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:43 UTCepss_batch

Frequently asked(5)

What is CVE-2024-30156?

CVE-2024-30156 is a high vulnerability published on March 24, 2024. 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.

When was CVE-2024-30156 disclosed?

CVE-2024-30156 was first published in the National Vulnerability Database on March 24, 2024, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2024-30156 actively exploited?

CVE-2024-30156 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 21.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2024-30156?

CVE-2024-30156 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2024-30156?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-30156, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2024-30156

Published

Last Modified

References (4)

Patch Availability(9)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-30156?

Same vendor

Same CWE

CVE-2024-30156

📅 Published

🔄 Last Modified

🔗 References (4)

Patch Availability(9)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-30156?

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Frequently asked(5)

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