Vulnerability · Published Apr 24, 2026 · Assigned by GitHub_M
CVE-2026-41481LangChain: HTMLHeaderTextSplitter.split_text_from_url SSRF Redirect Bypass
Medium 6.5
In plain English
A medium-severity server-side request forgery in langchain-text-splitters from langchain-ai. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
LangChain is a framework for building agents and LLM-powered applications. Prior to langchain-text-splitters 1.1.2, HTMLHeaderTextSplitter.split_text_from_url() validated the initial URL using validate_safe_url() but then performed the fetch with requests.get() with redirects enabled (the default). Because redirect targets were not revalidated, a URL pointing to an attacker-controlled server could redirect to internal, localhost, or cloud metadata endpoints, bypassing SSRF protections. The response body is parsed and returned as Document objects to the calling application code. Whether this constitutes a data exfiltration path depends on the application: if it exposes Document contents (or derivatives) back to the requester who supplied the URL, sensitive data from internal endpoints could be leaked. Applications that store or process Documents internally without returning raw content to the requester are not directly exposed to data exfiltration through this issue. This vulnerability is fixed in 1.1.2.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | langchain-text-splitters | 1.1.2 | GHSA-fv5p-p927-qmxr |
| PyPI | langchain-text-splitters | 1.1.2 | PYSEC-2026-77 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| langchain-ai | langchain-text-splitters | < 1.1.2 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
References
- https://github.com/langchain-ai/langchain/security/advisories/GHSA-fv5p-p927-qmxr x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2026-41481 vdb-entry, x_refsource_REDHAT
- RHBZ#2461733 issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41481.json x_sadp-csaf-vex