CVE-2025-68665 is a critical serialization injection vulnerability affecting LangChain JS and Python versions prior to @langchain/core 0.3.80/1.1.8 and langchain 0.3.37/1.2.3. The flaw allows malicious user-controlled data containing an internal 'lc' key to be deserialized as legitimate LangChain objects, bypassing intended data handling. With a CVSS score of 9.1 (Critical), this vulnerability is remotely exploitable with low attack complexity and no user interaction, potentially leading to high confidentiality and integrity impacts. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.3.37CPE matchmatch criteria | cpe:2.3:a:langchain:langchain.js:*:*:*:*:*:*:*:* | ||
>= 1.0.0, < 1.2.3CPE matchmatch criteria | cpe:2.3:a:langchain:langchain.js:*:*:*:*:*:*:*:* | ||
< 0.3.80CPE matchmatch criteria | cpe:2.3:a:langchain:langchain\/core:*:*:*:*:*:node.js:*:* | ||
>= 1.0.0, < 1.1.8CPE matchmatch criteria | cpe:2.3:a:langchain:langchain\/core:*:*:*:*:*:node.js:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.