Internal service access via URL parser differential
Published Jul 29, 2026 · Updated Jul 29, 2026
SSRF in V 0.5.2 and earlier allows remote attackers to access internal services through applications that validate URLs with net.urllib. net.urllib.parse extracts an allowlisted host from a backslash-bearing authority, while net.http.get normalizes the backslash and connects to the preceding internal host. Exploitation requires an application to validate attacker-controlled URLs with net.urllib before fetching the same input with net.http; the demonstrated consequence is unauthorized internal-service access.
Summary
What happened
SSRF in V 0.5.2 and earlier allows remote attackers to access internal services through applications that validate URLs with net.urllib. net.urllib.parse extracts an allowlisted host from a backslash-bearing authority, while net.http.get normalizes the backslash and connects to the preceding internal host. Exploitation requires an application to validate attacker-controlled URLs with net.urllib before fetching the same input with net.http; the demonstrated consequence is unauthorized internal-service access.
The record
- CVE
- CVE-2026-67201
- Published
- Jul 29, 2026
- Updated
- Jul 29, 2026
- Vendor
- The V Programming Language
- Product
- V
- Classifications
- CWE-436
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 29, 2026CVE publishedPublication date reported by the CVE source.
- Jul 29, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=0.5.2
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Backslash URL parser differential proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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