How severe is CVE-2025-30346?

CVE-2025-30346 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-30346 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-30346?

CVE-2025-30346 primarily affects Varnish-software Varnish Enterprise. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-30346?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-30346 have an EU (EUVD) identifier?

Yes. CVE-2025-30346 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7260.

When was CVE-2025-30346 published?

CVE-2025-30346 was published on 2025-03-21 and last updated on 2026-06-17.

CVE-2025-30346

CVE-2025-30346 is a medium-severity vulnerability in Varnish-software Varnish Enterprise with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-444.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-7260
Weakness: CWE-444
Affected product: Varnish-software Varnish Enterprise
Published: 2025-03-21
Last modified: 2026-06-17

Description

Varnish Cache before 7.6.2 and Varnish Enterprise before 6.0.13r10 allow client-side desync via HTTP/1 requests.

Frequently asked questions

What is CVE-2025-30346?: Varnish Cache before 7.6.2 and Varnish Enterprise before 6.0.13r10 allow client-side desync via HTTP/1 requests.
How severe is CVE-2025-30346?: CVE-2025-30346 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-30346 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-30346?: CVE-2025-30346 primarily affects Varnish-software Varnish Enterprise. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-30346?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-30346 have an EU (EUVD) identifier?: Yes. CVE-2025-30346 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7260.
When was CVE-2025-30346 published?: CVE-2025-30346 was published on 2025-03-21 and last updated on 2026-06-17.

References

Affected products (26)

cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r1:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r2:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r3:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r4:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r5:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r6:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r7:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r1:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r2:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r3:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r4:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r5:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r6:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r7:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r8:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r9:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r1:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r2:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r3:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r4:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r5:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r6:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r7:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r8:*:*:*:*:*:*
cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r9:*:*:*:*:*:*
cpe:2.3:a:varnish_cache_project:varnish_cache:*:*:*:*:*:*:*:*

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