CVE-2026-40087
2 advisories.
PyPI/langchain-core CVE-2026-40087: medium 5.3, EPSS 0.45%
LangChain has incomplete f-string validation in prompt templates
Action: Upgrade langchain-core to 0.3.84 or later.
pip install langchain-core==0.3.84pip install langchain-core==1.2.28Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 0.3.84 | - |
| 1.0.0a1 | 1.2.28 | - |
Fixed versions
| 0.3.84 | 1.2.28 |
Sources
- osv: GHSA-926x-3r5x-gfhw
- https://github.com/langchain-ai/langchain/security/advisories/GHSA-926x-3r5x-gfhw
- https://nvd.nist.gov/vuln/detail/CVE-2026-40087
- https://github.com/langchain-ai/langchain/pull/36612
- https://github.com/langchain-ai/langchain/pull/36613
- https://github.com/langchain-ai/langchain/commit/6bab0ba3c12328008ddca3e0d54ff5a6151cd27b
- https://github.com/langchain-ai/langchain/commit/af2ed47c6f008cdd551f3c0d87db3774c8dfe258
- https://github.com/langchain-ai/langchain
- https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D0.3.84
- https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.28
CVE-2026-40087 · published · modified · JSON
PyPI/langchain-core CVE-2026-40087: medium 5.3, EPSS 0.45%
LangChain has incomplete f-string validation in prompt templates
Action: Upgrade langchain-core to 0.3.84 or later.
pip install langchain-core==0.3.84pip install langchain-core==1.2.28Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 0.3.84 | - |
| 1.0.0a1 | 1.2.28 | - |
Fixed versions
| 0.3.84 | 1.2.28 |
Sources
- osv: PYSEC-2026-2563
- https://github.com/langchain-ai/langchain/security/advisories/GHSA-926x-3r5x-gfhw
- https://nvd.nist.gov/vuln/detail/CVE-2026-40087
- https://github.com/langchain-ai/langchain/pull/36612
- https://github.com/langchain-ai/langchain/pull/36613
- https://github.com/langchain-ai/langchain/commit/6bab0ba3c12328008ddca3e0d54ff5a6151cd27b
- https://github.com/langchain-ai/langchain/commit/af2ed47c6f008cdd551f3c0d87db3774c8dfe258
- https://github.com/langchain-ai/langchain
- https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D0.3.84
- https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.28
- https://pypi.org/project/langchain-core
- https://github.com/advisories/GHSA-926x-3r5x-gfhw
CVE-2026-40087 · published · modified · JSON