GHSA-926x-3r5x-gfhw: langchain-core fixed in 1.2.28 and 0.3.84

GHSA-926x-3r5x-gfhw PUBLISHED CVSS 5.300000190734863 MEDIUM

LangChain has incomplete f-string validation in prompt templates

Record from GitHub Advisory Database · Published April 8, 2026

langchain-core is fixed in 1.2.28 and 0.3.84 (PyPI)

LangChain has incomplete f-string validation in prompt templates

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

Package	Ecosystem	Fixed in
langchain-core	PyPI	1.2.28, 0.3.84
open-webui	Wolfi	0.8.12-r3
open-webui	Chainguard	0.8.12-r3
py3-langchain	Chainguard	1.3.0-r0
py3-langchain	Wolfi	1.3.0-r0

Risk scores

CVSS 3.1

5.300000190734863

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

Vendor	Product	Versions
wolfi	open-webui	0
chainguard	open-webui	0
chainguard	py3-langchain	0
PyPI	langchain-core	0
wolfi	py3-langchain	0

Timeline

Apr 8, 2026 CVE Published
Apr 16, 2026 Security Advisory

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