What is CVE-2023-43654?

CVE-2023-43654 is a critical-severity vulnerability in Pytorch Serve, classified under Server-Side Request Forgery (SSRF). CVSS score: 10.0/10. Published 2023-09-28.

How severe is CVE-2023-43654?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Is CVE-2023-43654 known to be exploited?

12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SSRF in Pytorch Serve

CVE-2023-43654

TorchServe is a tool for serving and scaling PyTorch models in production. TorchServe default configuration lacks proper input validation, enabling third parties to invoke remote HTTP download requests and write files to the disk. This issue could be taken advantage of to compromise the integrity of the system and sensitive data. This issue is present in versions 0.1.0 to 0.8.1. A user is able to load the model of their choice from any URL that they would like to use. The user of TorchServe is responsible for configuring both the allowed_urls and specifying the model URL to be used. A pull request to warn the user when the default value for allowed_urls is used has been merged in PR #2534. TorchServe release 0.8.2 includes this change. Users are advised to upgrade. There are no known workarounds for this issue.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2023-09-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.406 (98.6th percentile), scored 2026-10-02.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.355 · newest: 0.406 · change: +0.051

Affected products

Pytorch Serve — versions >= 0.1.0, < 0.8.2
Pytorch Torchserve

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

Public proof-of-concept exploits

References

github.com/pytorch/serve/security/advisories/GHSA-8fxr-qfr9-p34w (Vendor Advisory)
github.com/pytorch/serve/pull/2534 (Issue Tracking)
github.com/pytorch/serve/releases/tag/v0.8.2 (Release Notes)
packetstormsecurity.com/files/175095/PyTorch-Model-Server-Registration-Deserial… (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2023-43654?: CVE-2023-43654 is a critical-severity vulnerability in Pytorch Serve, classified under Server-Side Request Forgery (SSRF). CVSS score: 10.0/10. Published 2023-09-28.
How severe is CVE-2023-43654?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2023-43654 known to be exploited?: 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.