Squid 2.7 to 2.7.STABLE5, 3.0 to 3.0.STABLE12, and 3.1 to 3.1.0.4 allows remote attackers…
Priority MEDIUM 61CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Squid 2.7 to 2.7.STABLE5, 3.0 to 3.0.STABLE12, and 3.1 to 3.1.0.4 allows remote attackers to cause a denial of service via an HTTP request with an invalid version number, which triggers a reachable assertion in (1) HttpMsg.c and (2) HttpStatusLine.c.
Why it matters now
EPSS 0.71986 99th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 22
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:squid:squid:2.7.stable1:*:*:*:*:*:*:* | 2.7.stable1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.7.stable2:*:*:*:*:*:*:* | 2.7.stable2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.7.stable3:*:*:*:*:*:*:* | 2.7.stable3 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.7.stable4:*:*:*:*:*:*:* | 2.7.stable4 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:2.7.stable5:*:*:*:*:*:*:* | 2.7.stable5 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.0.stable1:*:*:*:*:*:*:* | 3.0.stable1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.0.stable2:*:*:*:*:*:*:* | 3.0.stable2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.0.stable3:*:*:*:*:*:*:* | 3.0.stable3 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.0.stable4:*:*:*:*:*:*:* | 3.0.stable4 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.0.stable5:*:*:*:*:*:*:* | 3.0.stable5 | Vulnerable | Squid |
- cpe:2.3:a:squid:squid:2.7.stable1:*:*:*:*:*:*:* Versions 2.7.stable1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.7.stable2:*:*:*:*:*:*:* Versions 2.7.stable2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.7.stable3:*:*:*:*:*:*:* Versions 2.7.stable3 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.7.stable4:*:*:*:*:*:*:* Versions 2.7.stable4 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:2.7.stable5:*:*:*:*:*:*:* Versions 2.7.stable5 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.0.stable1:*:*:*:*:*:*:* Versions 3.0.stable1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.0.stable2:*:*:*:*:*:*:* Versions 3.0.stable2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.0.stable3:*:*:*:*:*:*:* Versions 3.0.stable3 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.0.stable4:*:*:*:*:*:*:* Versions 3.0.stable4 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.0.stable5:*:*:*:*:*:*:* Versions 3.0.stable5 Vulnerable ·Squid
Show 12 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:squid:squid:3.0.stable6:*:*:*:*:*:*:* | 3.0.stable6 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.0.stable7:*:*:*:*:*:*:* | 3.0.stable7 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.0.stable8:*:*:*:*:*:*:* | 3.0.stable8 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.0.stable9:*:*:*:*:*:*:* | 3.0.stable9 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.0.stable10:*:*:*:*:*:*:* | 3.0.stable10 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.0.stable11:*:*:*:*:*:*:* | 3.0.stable11 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.0.stable12:*:*:*:*:*:*:* | 3.0.stable12 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.1:*:*:*:*:*:*:* | 3.1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.1.0.1:*:*:*:*:*:*:* | 3.1.0.1 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.1.0.2:*:*:*:*:*:*:* | 3.1.0.2 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.1.0.3:*:*:*:*:*:*:* | 3.1.0.3 | Vulnerable | Squid |
| cpe:2.3:a:squid:squid:3.1.0.4:*:*:*:*:*:*:* | 3.1.0.4 | Vulnerable | Squid |
- cpe:2.3:a:squid:squid:3.0.stable6:*:*:*:*:*:*:* Versions 3.0.stable6 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.0.stable7:*:*:*:*:*:*:* Versions 3.0.stable7 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.0.stable8:*:*:*:*:*:*:* Versions 3.0.stable8 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.0.stable9:*:*:*:*:*:*:* Versions 3.0.stable9 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.0.stable10:*:*:*:*:*:*:* Versions 3.0.stable10 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.0.stable11:*:*:*:*:*:*:* Versions 3.0.stable11 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.0.stable12:*:*:*:*:*:*:* Versions 3.0.stable12 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.1:*:*:*:*:*:*:* Versions 3.1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.1.0.1:*:*:*:*:*:*:* Versions 3.1.0.1 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.1.0.2:*:*:*:*:*:*:* Versions 3.1.0.2 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.1.0.3:*:*:*:*:*:*:* Versions 3.1.0.3 Vulnerable ·Squid
- cpe:2.3:a:squid:squid:3.1.0.4:*:*:*:*:*:*:* Versions 3.1.0.4 Vulnerable ·Squid
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2009-0478
- 2026-10-03 Alias added: GHSA-cfw6-qxff-576v
References
More Squid vulnerabilities
- TI-2005-00207 The httpProcessReplyHeader function in http.c for Squid 2.5-STABLE7 and earlier does not… CVSS 2.0MEDIUM 5.0
- TI-2005-00080 The WCCP message parsing code in Squid 2.5.STABLE7 and earlier allows remote attackers to… CVSS 2.0MEDIUM 5.0
- TI-2005-00142 squid_ldap_auth in Squid 2.5 and earlier allows remote authenticated users to bypass… CVSS 2.0HIGH 7.5
- TI-2005-00143 Squid 2.5 up to 2.5.STABLE7 allows remote attackers to poison the cache or conduct… CVSS 2.0MEDIUM 5.0
- TI-2005-00404 Squid 2.5.STABLE8 and earlier allows remote attackers to cause a denial of service… CVSS 2.0MEDIUM 5.0
- TI-2005-00162 Squid 2.5, when processing the configuration file, parses empty Access Control Lists… CVSS 2.0HIGH 10.0
Sources
- CVE-2009-0478 · CVE Program
- CVE-2009-0478 · NVD
- FIRST EPSS
- GHSA-cfw6-qxff-576v · GitHub Advisory Database · CC BY 4.0
- CVE-2009-0478 · 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