Varnish Cache before 7.6.2 and Varnish Enterprise before 6.0.13r10 allow client-side desync via HTTP/1 requests.
Priority LOW 24CWE-444Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
Varnish Cache before 7.6.2 and Varnish Enterprise before 6.0.13r10 allow client-side desync via HTTP/1 requests.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00313 24th percentileScored 2026-11-07
Fix Partial Varnish Cache (varnish-software): 7.6.2Red Hat: 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| varnish-software | Varnish Cache | 7.5.0 to before 7.6.2 | 7.6.2 | Patch available | CNA |
- Varnish Cache Vendorvarnish-software Affected 7.5.0 to before 7.6.2 Fixed in 7.6.2 Patch available CNA
CPE configurations NVD · 26
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r1:*:*:*:*:*:* | 6.0.11 r1 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r2:*:*:*:*:*:* | 6.0.11 r2 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r3:*:*:*:*:*:* | 6.0.11 r3 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r4:*:*:*:*:*:* | 6.0.11 r4 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r5:*:*:*:*:*:* | 6.0.11 r5 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r6:*:*:*:*:*:* | 6.0.11 r6 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r7:*:*:*:*:*:* | 6.0.11 r7 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r1:*:*:*:*:*:* | 6.0.12 r1 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r2:*:*:*:*:*:* | 6.0.12 r2 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r3:*:*:*:*:*:* | 6.0.12 r3 | Vulnerable | varnish-software |
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r1:*:*:*:*:*:* Versions 6.0.11 r1 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r2:*:*:*:*:*:* Versions 6.0.11 r2 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r3:*:*:*:*:*:* Versions 6.0.11 r3 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r4:*:*:*:*:*:* Versions 6.0.11 r4 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r5:*:*:*:*:*:* Versions 6.0.11 r5 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r6:*:*:*:*:*:* Versions 6.0.11 r6 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.11:r7:*:*:*:*:*:* Versions 6.0.11 r7 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r1:*:*:*:*:*:* Versions 6.0.12 r1 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r2:*:*:*:*:*:* Versions 6.0.12 r2 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r3:*:*:*:*:*:* Versions 6.0.12 r3 Vulnerable ·varnish-software
Show 16 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r4:*:*:*:*:*:* | 6.0.12 r4 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r5:*:*:*:*:*:* | 6.0.12 r5 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r6:*:*:*:*:*:* | 6.0.12 r6 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r7:*:*:*:*:*:* | 6.0.12 r7 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r8:*:*:*:*:*:* | 6.0.12 r8 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r9:*:*:*:*:*:* | 6.0.12 r9 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r1:*:*:*:*:*:* | 6.0.13 r1 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r2:*:*:*:*:*:* | 6.0.13 r2 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r3:*:*:*:*:*:* | 6.0.13 r3 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r4:*:*:*:*:*:* | 6.0.13 r4 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r5:*:*:*:*:*:* | 6.0.13 r5 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r6:*:*:*:*:*:* | 6.0.13 r6 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r7:*:*:*:*:*:* | 6.0.13 r7 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r8:*:*:*:*:*:* | 6.0.13 r8 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r9:*:*:*:*:*:* | 6.0.13 r9 | Vulnerable | varnish-software |
| cpe:2.3:a:varnish_cache_project:varnish_cache:*:*:*:*:*:*:*:* | before 7.6.2 | Vulnerable | Varnish Cache Project |
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r4:*:*:*:*:*:* Versions 6.0.12 r4 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r5:*:*:*:*:*:* Versions 6.0.12 r5 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r6:*:*:*:*:*:* Versions 6.0.12 r6 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r7:*:*:*:*:*:* Versions 6.0.12 r7 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r8:*:*:*:*:*:* Versions 6.0.12 r8 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.12:r9:*:*:*:*:*:* Versions 6.0.12 r9 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r1:*:*:*:*:*:* Versions 6.0.13 r1 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r2:*:*:*:*:*:* Versions 6.0.13 r2 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r3:*:*:*:*:*:* Versions 6.0.13 r3 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r4:*:*:*:*:*:* Versions 6.0.13 r4 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r5:*:*:*:*:*:* Versions 6.0.13 r5 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r6:*:*:*:*:*:* Versions 6.0.13 r6 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r7:*:*:*:*:*:* Versions 6.0.13 r7 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r8:*:*:*:*:*:* Versions 6.0.13 r8 Vulnerable ·varnish-software
- cpe:2.3:a:varnish-software:varnish_enterprise:6.0.13:r9:*:*:*:*:*:* Versions 6.0.13 r9 Vulnerable ·varnish-software
- cpe:2.3:a:varnish_cache_project:varnish_cache:*:*:*:*:*:*:*:* Versions before 7.6.2 Vulnerable ·Varnish Cache Project
Remediation
- Fix · CNA Varnish Cache (varnish-software) Fixed in 7.6.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
Not affected: 2 products
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2025-30346
- 2026-10-03 Alias added: GHSA-hxcm-q7m2-7qhp
References
More varnish-software Varnish Enterprise vulnerabilities
- TI-2026-26733 Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked… CVSS 3.1CRITICAL 9.8
- TI-2023-21726 libvmod-digest before 1.0.3, as used in Varnish Enterprise 6.0.x before 6.0.11r5, has an… CVSS 3.1MEDIUM 6.5
- TI-2025-21653 Out-of-bounds read in varnish-software Varnish Enterprise CVSS 3.1HIGH 7.5
- TI-2026-29163 Resource allocation without limits in varnish-software Varnish Enterprise CVSS 3.1HIGH 7.5
- TI-2026-29162 Varnish Cache 9 before 9.0.1 and Varnish Enterprise before 6.0.16r11 allows a "workspace… CVSS 3.1HIGH 7.5
Sources
- CVE-2025-30346 · CVE Program
- CVE-2025-30346 · NVD
- FIRST EPSS
- GHSA-hxcm-q7m2-7qhp · GitHub Advisory Database · CC BY 4.0
- CVE-2025-30346 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences