CVE-2026-41488
개요
A flaw was found in langchain-openai. A remote attacker could exploit a Time-of-Check to Time-of-Use (TOCTOU) vulnerability, also known as a DNS rebinding vulnerability. This occurs because the _url_to_size() helper, used for image token counting, validates URLs for Server-Side Request Forgery (SSRF) protection and then fetches them in a separate network operation with independent DNS resolution. This allows an attacker to bypass SSRF protection, potentially leading to unauthorized access to internal resources or information disclosure.
내용
This vulnerability has a Low impact on Red Hat products. The flaw in langchain-openai allows a remote attacker to bypass Server-Side Request Forgery (SSRF) protection through a DNS rebinding attack. This is due to a Time-of-Check to Time-of-Use (TOCTOU) vulnerability during URL validation and fetching, which could lead to unauthorized access to internal resources or information disclosure. Exploitation requires a specific timing window and control over DNS resolution.
완화 방법
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
CVSS (Common Vulnerability Scoring System) 점수 세부 사항
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
다음의 CVSS 지표 및 점수는 예비 정보로 검토 대상입니다.
CVSS v3 점수 분석
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| 기본 점수 | 3.4 | N/A | N/A |
| 공격 벡터 | Network | N/A | N/A |
| 공격 복잡성 | High | N/A | N/A |
| 필요한 권한 | None | N/A | N/A |
| 사용자 상호 작용 | Required | N/A | N/A |
| 범위 | Changed | N/A | N/A |
| 기밀성 | Low | N/A | N/A |
| 무결성에 미치는 영향 | None | N/A | N/A |
| 가용성에 미치는 영향 | None | N/A | N/A |
벡터
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N
취약점 이해 (CWE)
Integrity,Other
Technical Impact: Alter Execution Logic; Unexpected State
The attacker can gain access to otherwise unauthorized resources.
Integrity,Other
Technical Impact: Modify Application Data; Modify Files or Directories; Modify Memory; Other
Race conditions such as this kind may be employed to gain read or write access to resources which are not normally readable or writable by the user in question.
Integrity,Other
Technical Impact: Other
The resource in question, or other resources (through the corrupted one), may be changed in undesirable ways by a malicious user.
Non-Repudiation
Technical Impact: Hide Activities
If a file or other resource is written in this method, as opposed to in a valid way, logging of the activity may not occur.
Non-Repudiation,Other
Technical Impact: Other
In some cases it may be possible to delete files a malicious user might not otherwise have access to, such as log files.
Other
Technical Impact: Unexpected State
The product may perform invalid actions when the resource is in an unexpected state.
