langchain-openai: Image token counting SSRF protection can be bypassed via DNS rebinding

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0016, the 4th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 16 Apr 2026, 17:21 UTC Published by the maintainers as a GitHub repository advisory

Sources

• GitHub Advisory Database: GHSA-r7w7-9xr2-qq2r
• OSV: GHSA-r7w7-9xr2-qq2r
• github.com/langchain-ai/langchain/security/advisories/GHSA-r7w7-9xr2-qq2r
• nvd.nist.gov/vuln/detail/CVE-2026-41488
• github.com/langchain-ai/langchain
• github.com/pypa/advisory-database/tree/main/vulns/langchain-openai/PYSEC-2026-76.yaml

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.