CVE-2026-57942

Medium

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.

SeverityMedium

CVSS5.3

Exploit probability14. percentile0.2%

ProductLibreTranslate

PublishedJun 29, 2026

First seenJun 29, 2026

Weakness typeCWE-348CWE-348

How to fix

Patches

github.com/LibreTranslate/LibreTranslate/commit/397fd224080515d4001a1bc60c8fed53e3c56b6f

Affected products

Product	Affected versions	Fixed in
LibreTranslate LibreTranslate	v ≤ 1.9.7	—

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