HTTP Response Smuggling Vulnerability in libhv
Priority MEDIUM 49CWE-444Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in ithewei libhv allows HTTP Response Smuggling.This issue affects libhv: through 1.3.3.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00385 32nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
No affected products listed by the sources yet.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-1867
- 2026-10-03 Alias added: GHSA-4qqr-wvpj-rjf9
References
More ithewei vulnerabilities
- TI-2023-11371 HTTP response splitting in ithewei/libhv CVSS 3.1MEDIUM 6.1
- TI-2023-11370 Cross-site scripting in ithewei/libhv CVSS 3.1MEDIUM 6.1
- TI-2023-11372 Injection in ithewei/libhv CVSS 3.1MEDIUM 5.4
Sources
- CVE-2025-1867 · CVE Program
- CVE-2025-1867 · NVD
- FIRST EPSS
- GHSA-4qqr-wvpj-rjf9 · GitHub Advisory Database · CC BY 4.0
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