CRLF injection vulnerability in Sys.Web in Mono 2.0 and earlier allows remote attackers…
Priority LOW 30CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- —
- Confidentiality · integrity · availability
- None · Partial · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
CRLF injection vulnerability in Sys.Web in Mono 2.0 and earlier allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via CRLF sequences in the query string.
Why it matters now
EPSS 0.07102 94th percentileScored 2026-11-07
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 · 20
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mono:mono:1.0:*:*:*:*:*:*:* | 1.0 | Vulnerable | mono |
| cpe:2.3:a:mono:mono:1.0.5:*:*:*:*:*:*:* | 1.0.5 | Vulnerable | mono |
| cpe:2.3:a:mono:mono:1.1.4:*:*:*:*:*:*:* | 1.1.4 | Vulnerable | mono |
| cpe:2.3:a:mono:mono:1.1.8.3:*:*:*:*:*:*:* | 1.1.8.3 | Vulnerable | mono |
| cpe:2.3:a:mono:mono:1.1.13:*:*:*:*:*:*:* | 1.1.13 | Vulnerable | mono |
| cpe:2.3:a:mono:mono:1.1.13.4:*:*:*:*:*:*:* | 1.1.13.4 | Vulnerable | mono |
| cpe:2.3:a:mono:mono:1.1.13.6:*:*:*:*:*:*:* | 1.1.13.6 | Vulnerable | mono |
| cpe:2.3:a:mono:mono:1.1.13.7:*:*:*:*:*:*:* | 1.1.13.7 | Vulnerable | mono |
| cpe:2.3:a:mono:mono:1.1.17:*:*:*:*:*:*:* | 1.1.17 | Vulnerable | mono |
| cpe:2.3:a:mono:mono:1.1.17.1:*:*:*:*:*:*:* | 1.1.17.1 | Vulnerable | mono |
- cpe:2.3:a:mono:mono:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·mono
- cpe:2.3:a:mono:mono:1.0.5:*:*:*:*:*:*:* Versions 1.0.5 Vulnerable ·mono
- cpe:2.3:a:mono:mono:1.1.4:*:*:*:*:*:*:* Versions 1.1.4 Vulnerable ·mono
- cpe:2.3:a:mono:mono:1.1.8.3:*:*:*:*:*:*:* Versions 1.1.8.3 Vulnerable ·mono
- cpe:2.3:a:mono:mono:1.1.13:*:*:*:*:*:*:* Versions 1.1.13 Vulnerable ·mono
- cpe:2.3:a:mono:mono:1.1.13.4:*:*:*:*:*:*:* Versions 1.1.13.4 Vulnerable ·mono
- cpe:2.3:a:mono:mono:1.1.13.6:*:*:*:*:*:*:* Versions 1.1.13.6 Vulnerable ·mono
- cpe:2.3:a:mono:mono:1.1.13.7:*:*:*:*:*:*:* Versions 1.1.13.7 Vulnerable ·mono
- cpe:2.3:a:mono:mono:1.1.17:*:*:*:*:*:*:* Versions 1.1.17 Vulnerable ·mono
- cpe:2.3:a:mono:mono:1.1.17.1:*:*:*:*:*:*:* Versions 1.1.17.1 Vulnerable ·mono
Show 10 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mono:mono:1.1.18:*:*:*:*:*:*:* | 1.1.18 | Vulnerable | mono |
| cpe:2.3:a:mono:mono:1.2.5.1:*:*:*:*:*:*:* | 1.2.5.1 | Vulnerable | mono |
| cpe:2.3:a:mono_project:mono:*:*:*:*:*:*:*:* | up to 2.0 | Vulnerable | Mono Project |
| cpe:2.3:a:mono_project:mono:1.2.1:*:*:*:*:*:*:* | 1.2.1 | Vulnerable | Mono Project |
| cpe:2.3:a:mono_project:mono:1.2.2:*:*:*:*:*:*:* | 1.2.2 | Vulnerable | Mono Project |
| cpe:2.3:a:mono_project:mono:1.2.3:*:*:*:*:*:*:* | 1.2.3 | Vulnerable | Mono Project |
| cpe:2.3:a:mono_project:mono:1.2.4:*:*:*:*:*:*:* | 1.2.4 | Vulnerable | Mono Project |
| cpe:2.3:a:mono_project:mono:1.2.5:*:*:*:*:*:*:* | 1.2.5 | Vulnerable | Mono Project |
| cpe:2.3:a:mono_project:mono:1.2.6:*:*:*:*:*:*:* | 1.2.6 | Vulnerable | Mono Project |
| cpe:2.3:a:mono_project:mono:1.9:*:*:*:*:*:*:* | 1.9 | Vulnerable | Mono Project |
- cpe:2.3:a:mono:mono:1.1.18:*:*:*:*:*:*:* Versions 1.1.18 Vulnerable ·mono
- cpe:2.3:a:mono:mono:1.2.5.1:*:*:*:*:*:*:* Versions 1.2.5.1 Vulnerable ·mono
- cpe:2.3:a:mono_project:mono:*:*:*:*:*:*:*:* Versions up to 2.0 Vulnerable ·Mono Project
- cpe:2.3:a:mono_project:mono:1.2.1:*:*:*:*:*:*:* Versions 1.2.1 Vulnerable ·Mono Project
- cpe:2.3:a:mono_project:mono:1.2.2:*:*:*:*:*:*:* Versions 1.2.2 Vulnerable ·Mono Project
- cpe:2.3:a:mono_project:mono:1.2.3:*:*:*:*:*:*:* Versions 1.2.3 Vulnerable ·Mono Project
- cpe:2.3:a:mono_project:mono:1.2.4:*:*:*:*:*:*:* Versions 1.2.4 Vulnerable ·Mono Project
- cpe:2.3:a:mono_project:mono:1.2.5:*:*:*:*:*:*:* Versions 1.2.5 Vulnerable ·Mono Project
- cpe:2.3:a:mono_project:mono:1.2.6:*:*:*:*:*:*:* Versions 1.2.6 Vulnerable ·Mono Project
- cpe:2.3:a:mono_project:mono:1.9:*:*:*:*:*:*:* Versions 1.9 Vulnerable ·Mono Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2008-3906
- 2026-10-03 Alias added: GHSA-fwxc-72gp-54jq
References
Sources
- CVE-2008-3906 · CVE Program
- CVE-2008-3906 · NVD
- FIRST EPSS
- GHSA-fwxc-72gp-54jq · GitHub Advisory Database · CC BY 4.0
- CVE-2008-3906 · Red Hat security data · CC BY 4.0
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