CVE-2026-78205

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Source
https://cve.org/CVERecord?id=CVE-2026-78205
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-78205.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-78205
Published
2026-08-24T00:30:45.786Z
Modified
2026-08-25T04:02:28.278477343Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N CVSS Calculator
Summary
BentoML 1.4.19 through 1.4.39 Server-Side Request Forgery via Unfiltered RFC 6598 Shared Address Space
Details

BentoML's outbound connection safeguard (makesafeconnect in internal/utils/uri.py) blocks private, loopback, and link-local IP addresses but fails to reject the RFC 6598 shared address space (100.64.0.0/10, CGNAT). In versions 1.4.19 through 1.4.39, an unauthenticated attacker can supply URLs pointing to that range via multipart file handling (MultipartSerde.ensurefile) or JSON request parsing (JSONSerde.parse_request), causing the server to make outbound requests to internal hosts on CGNAT networks (Server-Side Request Forgery). This is an incomplete fix for CVE-2025-54381.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78205.json"
}
References

Affected packages

Git / github.com/bentoml/bentoml

Affected ranges

Type
GIT
Repo
https://github.com/bentoml/bentoml
Events
Introduced
a51b1a13a52a5f5abd9795c2d6d17fe4150dd9e4
Fixed
e570eb2b1dd5ea49c09c261232a6b131a023d1b2
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "1.4.19"
        },
        {
            "last_affected": "1.4.39"
        },
        {
            "fixed": "1.4.39"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

v1.*
v1.4.19
v1.4.20
v1.4.21
v1.4.22
v1.4.23
v1.4.24
v1.4.25
v1.4.26
v1.4.27
v1.4.28
v1.4.29
v1.4.30
v1.4.31
v1.4.32
v1.4.33
v1.4.34
v1.4.35
v1.4.36
v1.4.38

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-78205.json"