CVE-2026-41488Network attack vector

Blind internal network probing via DNS rebinding

Published Apr 24, 2026 · Updated Apr 24, 2026

SSRF in LangChain langchain-openai before 1.1.14 allows remote attackers to probe internal hosts via rebinding image URLs. The _url_to_size helper validates a hostname before an independent httpx fetch resolves it again, allowing the destination to change to a private address. A caller must process an attacker-supplied image URL, and the path exposes only timing or error behavior rather than response content.

CVSS severity3.1
Low
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in LangChain langchain-openai before 1.1.14 allows remote attackers to probe internal hosts via rebinding image URLs. The _url_to_size helper validates a hostname before an independent httpx fetch resolves it again, allowing the destination to change to a private address. A caller must process an attacker-supplied image URL, and the path exposes only timing or error behavior rather than response content.

The record

CVE
CVE-2026-41488
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
LangChain
Product
langchain-openai
Classifications
CWE-918, T1046
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.1.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LangChain · langchain-openaiversion=< 1.1.14

Published CVSS scores

3.1GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1046Network Service Scanning

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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