langchain-ai langchain up to 1.2.10 Image Parser ChatOpenAI.get_num_tokens_from_messages image_url server-side request forgery

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability was found in langchain-ai langchain up to 1.2.10. It has been classified as critical. Affected is the function ChatOpenAI.get_num_tokens_from_messages of the component Image Parser. Performing a manipulation of the argument image_url results in server-side request forgery. This vulnerability is cataloged as CVE-2026-26013. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in langchain-ai langchain up to 1.2.10. It has been classified as critical. This affects the function ChatOpenAI.get_num_tokens_from_messages of the component Image Parser. The manipulation of the argument image_url with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

LangChain is a framework for building agents and LLM-powered applications. Prior to 1.2.11, the ChatOpenAI.get_num_tokens_from_messages() method fetches arbitrary image_url values without validation when computing token counts for vision-enabled models. This allows attackers to trigger Server-Side Request Forgery (SSRF) attacks by providing malicious image URLs in user input. This vulnerability is fixed in 1.2.11.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-26013 since 02/09/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.2.11 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 2b4b1dc29a833d4053deba4c2b77a3848c834565 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.7
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: langchain 1.2.11
Patch: 2b4b1dc29a833d4053deba4c2b77a3848c834565

Timelineinfo

02/09/2026 CVE reserved
02/11/2026 +2 days Advisory disclosed
02/11/2026 +0 days VulDB entry created
03/17/2026 +34 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-2g6r-c272-w58r
Status: Confirmed

CVE: CVE-2026-26013 (🔒)
GCVE (CVE): GCVE-0-2026-26013
GCVE (VulDB): GCVE-100-345399

Entryinfo

Created: 02/11/2026 05:06
Updated: 03/17/2026 23:28
Changes: 02/11/2026 05:06 (71), 03/17/2026 23:28 (1)
Complete: 🔍
Cache ID: 216::103

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