LibreTranslate – IP Spoofing via X-Forwarded-For Header_CVE-2026-57942

6.9 / 10

MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

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.

Basic Information

ID CVE-2026-57942

Source VulnCheck

Published Jun 29, 2026 at 17:17

Affected Product

Vendor LibreTranslate

Product LibreTranslate

Affected Versions LibreTranslate LibreTranslate 0

CWE Classification

CWE-348

References

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    "lastseen": "",
    "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.",
    "published": "2026-06-29T17:17:09.639Z",
    "modified": "2026-06-29T17:17:09.639Z",
    "type": "cve",
    "title": "LibreTranslate - IP Spoofing via X-Forwarded-For Header",
    "source": "VulnCheck",
    "references": "https://github.com/LibreTranslate/LibreTranslate/issues/986\nhttps://github.com/LibreTranslate/LibreTranslate/pull/987\nhttps://github.com/LibreTranslate/LibreTranslate/commit/397fd224080515d4001a1bc60c8fed53e3c56b6f\nhttps://www.vulncheck.com/advisories/libretranslate-ip-spoofing-via-x-forwarded-for-header",
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    "cvelist": null,
    "sourceData": "LibreTranslate LibreTranslate 0",
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    "cvss": {
        "score": 6.9,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
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        "privilegesRequired": "",
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        "cvssV3": {
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    "product": "LibreTranslate",
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