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CVE-2026-57942— LibreTranslate - IP Spoofing via X-Forwarded-For Header

Quick assessment

Affected
LibreTranslate LibreTranslate
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LibreTranslate LibreTranslate是LibreTranslate社区的一款自由开源的翻译软件。 LibreTranslate 1.9.7及之前版本存在信任管理问题漏洞，该漏洞源于get_remote_address()函数存在IP欺骗漏洞，未经身份验证的攻击者可通过在X-Forwarded-For标头中注入任意值来欺骗客户端IP地址，从而绕过每IP速率限制和洪水封禁，导致无限制的API滥用。

CVSS 5.3 · Medium EPSS 0.28% · P19

Affected Version Matrix 2

VendorProduct Version RangeStatus
LibreTranslate LibreTranslate ≤ 1.9.7 affected
397fd224080515d4001a1bc60c8fed53e3c56b6f unaffected
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I. Basic Information for CVE-2026-57942

Vulnerability Information
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Vulnerability Title
LibreTranslate - IP Spoofing via X-Forwarded-For Header
Source: CVE Program / CVE List V5
Vulnerability Description
LibreTranslate through 1.9.7, fixed in commit 397fd22, contains an IP spoofing vulnerability in the get_remote_address() function that allows unauthenticated attackers to spoof client IP addresses by injecting arbitrary values into the X-Forwarded-For header without trusted proxy validation. Attackers can bypass per-IP rate limiting and flood bans by supplying forged addresses in the X-Forwarded-For header to enable unlimited API abuse.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用不可信的源
Source: CVE Program / CVE List V5
Vulnerability Title
LibreTranslate 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LibreTranslate LibreTranslate是LibreTranslate社区的一款自由开源的翻译软件。 LibreTranslate 1.9.7及之前版本存在信任管理问题漏洞，该漏洞源于get_remote_address()函数存在IP欺骗漏洞，未经身份验证的攻击者可通过在X-Forwarded-For标头中注入任意值来欺骗客户端IP地址，从而绕过每IP速率限制和洪水封禁，导致无限制的API滥用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
LibreTranslate LibreTranslate 0 ~ 1.9.7 -

II. Public POCs for CVE-2026-57942

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III. Intelligence Information for CVE-2026-57942

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Patches & Fixes for CVE-2026-57942 (2)

Vendor Advisories for CVE-2026-57942 (1)

Other References for CVE-2026-57942 (1)

IV. Related Vulnerabilities

Same product: LibreTranslate
Same vendor: LibreTranslate
Same weakness: CWE-348

V. Comments for CVE-2026-57942

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