# CVE-2026-123818: LMDeploy URL parser disagreement permits SSRF filter bypass

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

LMDeploy is a toolkit for compressing, deploying, and serving large language models. From 0.12.3 until 0.15.0, _is_safe_url validates remote media URLs with urlparse while requests.Session().get interprets backslashes differently when sending the request. An attacker can provide a URL whose validation hostname appears globally routable but whose request destination resolves to an internal host, bypassing non-global address checks. Applications that accept attacker-controlled remote media URLs can therefore be induced to access internal HTTP services and expose data available from those services. This issue is fixed in version 0.15.0.

## Remediation

- fix: lmdeploy (PyPI): OSV reports a fixed version 0.15.0. Check the advisory for supported release branches. (source: OSV GHSA-39wr-7q6h-cf68) — https://github.com/advisories/GHSA-39wr-7q6h-cf68

## Affected products and versions

- InternLM / lmdeploy: >= 0.12.3, < 0.15.0 (affected). Source: CNA: GitHub_M
-  / lmdeploy (lmdeploy): 0.12.3 (affected, PyPI); 0.13.0 (affected, PyPI); 0.14.0 (affected, PyPI); Ecosystem version events: introduced 0.12.3; fixed 0.15.0. Source: OSV GHSA-39wr-7q6h-cf68

## Severity and prioritization

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-918

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/InternLM/lmdeploy/security/advisories/GHSA-39wr-7q6h-cf68 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/InternLM/lmdeploy/pull/4734 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/InternLM/lmdeploy/commit/03c313006d17cc3feae86b633c44206a997c44db (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/InternLM/lmdeploy/releases/tag/v0.15.0 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/advisories/GHSA-39wr-7q6h-cf68 (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-39wr-7q6h-cf68 (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-123818; retrieved 2026-11-09; source updated 2026-11-09

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-39wr-7q6h-cf68; retrieved 2026-11-09; source updated 2026-11-09

Revision: a37499588fe3ca4fc294304b23f6228e18b8ec5447d400f19aa530f7168c028d

Canonical: https://y2.dev/cve/CVE-2026-123818

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