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TI-2026-54391 Aliases CVE-2026-78205GHSA-x8r7-g3fv-cf37

BentoML 1.4.19 through 1.4.39 Server-Side Request Forgery via Unfiltered RFC 6598 Shared Address Space

Priority LOW 37CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

BentoML's outbound connection safeguard (make_safe_connect 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.ensure_file) 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0041 35th 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
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
bentomlBentoML1.4.19 – 1.4.39—No fix listedCNA
  • BentoML Vendorbentoml Affected 1.4.19 – 1.4.39 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:bentoml:bentoml:*:*:*:*:*:*:*:*——bentoml
  • cpe:2.3:a:bentoml:bentoml:*:*:*:*:*:*:*:* Versions — — ·bentoml

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-78205
  2. 2026-10-03 Alias added: GHSA-x8r7-g3fv-cf37

References

Other 3

  • TI-2025-34190 BentoML is Vulnerable to an SSRF Attack Through File Upload Processing CVSS 3.1CRITICAL 9.9
  • TI-2025-23454 Insecure Deserialization leads to RCE in BentoML's runner server CVSS 3.1CRITICAL 9.8
  • TI-2025-20352 BentoML Allows Remote Code Execution (RCE) via Insecure Deserialization CVSS 3.1CRITICAL 9.8
  • TI-2024-08420 Deserialization Vulnerability in BentoML's Runner Server in bentoml/bentoml CVSS 3.0CRITICAL 9.8
  • TI-2024-02720 Insecure Deserialization Leading to RCE in bentoml/bentoml CVSS 3.1CRITICAL 10.0
  • TI-2026-27247 BentoML has a Server-Side Template Injection via unsandboxed Jinja2 Environment in Dockerfile generation CVSS 3.1CRITICAL 9.6
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences