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| Vulnerability ID | VCID-3mrv-utn3-ffep |
| Aliases |
CVE-2026-41488
GHSA-r7w7-9xr2-qq2r PYSEC-2026-76 |
| Summary | LangChain is a framework for building agents and LLM-powered applications. Prior to 1.1.14, langchain-openai's _url_to_size() helper (used by get_num_tokens_from_messages for image token counting) validated URLs for SSRF protection and then fetched them in a separate network operation with independent DNS resolution. This left a TOCTOU / DNS rebinding window: an attacker-controlled hostname could resolve to a public IP during validation and then to a private/localhost IP during the actual fetch. |
| Status | Published |
| Exploitability | None |
| Weighted Severity | None |
| Risk | None |
| Affected and Fixed Packages | Package Details |
| There are no known CWE. |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 3.1 | https://github.com/langchain-ai/langchain/security/advisories/GHSA-r7w7-9xr2-qq2r |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/langchain-ai/langchain/security/advisories/GHSA-r7w7-9xr2-qq2r |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
No EPSS data available for this vulnerability.
| Date | Actor | Action | Source | VulnerableCode Version |
|---|---|---|---|---|
| 2026-06-02T04:24:55.222545+00:00 | Pypa Importer | Import | https://github.com/pypa/advisory-database/blob/main/vulns/langchain-openai/PYSEC-2026-76.yaml | 38.6.0 |