Blind SSRF via automatic redirect following
Published May 17, 2026 · Updated May 17, 2026
Server-side request forgery in Vercel AI SDK 3.0.0 through 3.0.97 allows remote attackers to send blind GET requests to internal services. The provider-utils downloadBlob path validates the initial URL, then native fetch follows attacker-controlled HTTP redirects before validateDownloadUrl checks the final destination. An application must pass an untrusted remote URL into the download path; the response body remains blocked, but internal GET endpoints can be reached or invoked.
Summary
What happened
Server-side request forgery in Vercel AI SDK 3.0.0 through 3.0.97 allows remote attackers to send blind GET requests to internal services. The provider-utils downloadBlob path validates the initial URL, then native fetch follows attacker-controlled HTTP redirects before validateDownloadUrl checks the final destination. An application must pass an untrusted remote URL into the download path; the response body remains blocked, but internal GET endpoints can be reached or invoked.
The record
- CVE
- CVE-2026-8768
- Published
- May 17, 2026
- Updated
- May 17, 2026
- Vendor
- Vercel
- Product
- AI SDK
- Classifications
- CWE-918, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 17, 2026CVE publishedPublication date reported by the CVE source.
- May 17, 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=3.0.0
- Affected versionversion=3.0.1
- Affected versionversion=3.0.10
- Affected versionversion=3.0.11
- Affected versionversion=3.0.12
- Affected versionversion=3.0.13
- Affected versionversion=3.0.14
- Affected versionversion=3.0.15
- Affected versionversion=3.0.16
- Affected versionversion=3.0.17
- Affected versionversion=3.0.18
- Affected versionversion=3.0.19
- Affected versionversion=3.0.2
- Affected versionversion=3.0.20
- Affected versionversion=3.0.21
- Affected versionversion=3.0.22
- Affected versionversion=3.0.23
- Affected versionversion=3.0.24
- Affected versionversion=3.0.25
- Affected versionversion=3.0.26
- Affected versionversion=3.0.27
- Affected versionversion=3.0.28
- Affected versionversion=3.0.29
- Affected versionversion=3.0.3
- Affected versionversion=3.0.30
- Affected versionversion=3.0.31
- Affected versionversion=3.0.32
- Affected versionversion=3.0.33
- Affected versionversion=3.0.34
- Affected versionversion=3.0.35
- Affected versionversion=3.0.36
- Affected versionversion=3.0.37
- Affected versionversion=3.0.38
- Affected versionversion=3.0.39
- Affected versionversion=3.0.4
- Affected versionversion=3.0.40
- Affected versionversion=3.0.41
- Affected versionversion=3.0.42
- Affected versionversion=3.0.43
- Affected versionversion=3.0.44
- Affected versionversion=3.0.45
- Affected versionversion=3.0.46
- Affected versionversion=3.0.47
- Affected versionversion=3.0.48
- Affected versionversion=3.0.49
- Affected versionversion=3.0.5
- Affected versionversion=3.0.50
- Affected versionversion=3.0.51
- Affected versionversion=3.0.52
- Affected versionversion=3.0.53
- Affected versionversion=3.0.54
- Affected versionversion=3.0.55
- Affected versionversion=3.0.56
- Affected versionversion=3.0.57
- Affected versionversion=3.0.58
- Affected versionversion=3.0.59
- Affected versionversion=3.0.6
- Affected versionversion=3.0.60
- Affected versionversion=3.0.61
- Affected versionversion=3.0.62
- Affected versionversion=3.0.63
- Affected versionversion=3.0.64
- Affected versionversion=3.0.65
- Affected versionversion=3.0.66
- Affected versionversion=3.0.67
- Affected versionversion=3.0.68
- Affected versionversion=3.0.69
- Affected versionversion=3.0.7
- Affected versionversion=3.0.70
- Affected versionversion=3.0.71
- Affected versionversion=3.0.72
- Affected versionversion=3.0.73
- Affected versionversion=3.0.74
- Affected versionversion=3.0.75
- Affected versionversion=3.0.76
- Affected versionversion=3.0.77
- Affected versionversion=3.0.78
- Affected versionversion=3.0.79
- Affected versionversion=3.0.8
- Affected versionversion=3.0.80
- Affected versionversion=3.0.81
- Affected versionversion=3.0.82
- Affected versionversion=3.0.83
- Affected versionversion=3.0.84
- Affected versionversion=3.0.85
- Affected versionversion=3.0.86
- Affected versionversion=3.0.87
- Affected versionversion=3.0.88
- Affected versionversion=3.0.89
- Affected versionversion=3.0.9
- Affected versionversion=3.0.90
- Affected versionversion=3.0.91
- Affected versionversion=3.0.92
- Affected versionversion=3.0.93
- Affected versionversion=3.0.94
- Affected versionversion=3.0.95
- Affected versionversion=3.0.96
- Affected versionversion=3.0.97
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
- Blind SSRF via HTTP redirects proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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