CVE-2026-43897: CWE-918: Server-Side Request Forgery (SSRF) in OP-Engineering link-preview-js
CVE-2026-43897 is a high-severity Server-Side Request Forgery (SSRF) vulnerability in the OP-Engineering link-preview-js library versions prior to 4.0.1. The vulnerability arises because the library did not properly validate IPv6 loopback addresses and was susceptible to DNS attacks that could resolve addresses to internal IPs. This flaw could lead to internal data leaks by allowing unauthorized access to internal network resources. The issue is fixed in version 4.0.1 of the library.
AI Analysis
Technical Summary
The OP-Engineering link-preview-js library, used to extract information from web links, contained an SSRF vulnerability (CWE-918) in versions before 4.0.1. Specifically, it failed to check for IPv6 loopback addresses and was vulnerable to DNS resolution attacks that could redirect requests to internal IP addresses. This could allow an attacker to cause the server to make unauthorized requests to internal systems, potentially exposing sensitive internal data. The vulnerability has a CVSS 4.0 base score of 8.7, indicating high severity. The issue is resolved in version 4.0.1 of the library.
Potential Impact
Exploitation of this SSRF vulnerability could lead to unauthorized internal network access and data leaks. Since the library did not validate IPv6 loopback addresses or properly handle DNS resolution, an attacker could craft malicious links that cause the server to access internal IP addresses, potentially exposing sensitive internal information. There are no known exploits in the wild at this time.
Mitigation Recommendations
This vulnerability is fixed in link-preview-js version 4.0.1. Users of the library should upgrade to version 4.0.1 or later to remediate this issue. No additional mitigation guidance is provided or required beyond applying this update. Patch status is confirmed fixed in version 4.0.1.
CVE-2026-43897: CWE-918: Server-Side Request Forgery (SSRF) in OP-Engineering link-preview-js
Description
CVE-2026-43897 is a high-severity Server-Side Request Forgery (SSRF) vulnerability in the OP-Engineering link-preview-js library versions prior to 4.0.1. The vulnerability arises because the library did not properly validate IPv6 loopback addresses and was susceptible to DNS attacks that could resolve addresses to internal IPs. This flaw could lead to internal data leaks by allowing unauthorized access to internal network resources. The issue is fixed in version 4.0.1 of the library.
CVSS v4.0
Score 8.7high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The OP-Engineering link-preview-js library, used to extract information from web links, contained an SSRF vulnerability (CWE-918) in versions before 4.0.1. Specifically, it failed to check for IPv6 loopback addresses and was vulnerable to DNS resolution attacks that could redirect requests to internal IP addresses. This could allow an attacker to cause the server to make unauthorized requests to internal systems, potentially exposing sensitive internal data. The vulnerability has a CVSS 4.0 base score of 8.7, indicating high severity. The issue is resolved in version 4.0.1 of the library.
Potential Impact
Exploitation of this SSRF vulnerability could lead to unauthorized internal network access and data leaks. Since the library did not validate IPv6 loopback addresses or properly handle DNS resolution, an attacker could craft malicious links that cause the server to access internal IP addresses, potentially exposing sensitive internal information. There are no known exploits in the wild at this time.
Mitigation Recommendations
This vulnerability is fixed in link-preview-js version 4.0.1. Users of the library should upgrade to version 4.0.1 or later to remediate this issue. No additional mitigation guidance is provided or required beyond applying this update. Patch status is confirmed fixed in version 4.0.1.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-04T16:11:33.085Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a028746cbff5d86108b50df
Added to database: 05/12/2026, 01:49:58 UTC
Last enriched: 05/19/2026, 10:54:07 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 74
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