CVE-2026-57942
MEDIUMLibreTranslate - IP Spoofing via X-Forwarded-For Header
Title source: cnaDescription
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.
References (4)
Core 4
Core References
Issue Tracking issue-tracking
Pull Request
https://github.com/LibreTranslate/LibreTranslate/pull/987
Patch patch
Patch Commit
https://github.com/LibreTranslate/LibreTranslate/commit/397fd224080515d4001a1bc60c8fed53e3c56b6f
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/libretranslate-ip-spoofing-via-x-forwarded-for-header
Technical Description issue-tracking
Researcher Disclosure
https://github.com/LibreTranslate/LibreTranslate/issues/986
Scores
CVSS v3
5.3
EPSS
0.0019
EPSS Percentile
9.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-348
Status
published
Products (2)
LibreTranslate/LibreTranslate
< 1.9.7
LibreTranslate/LibreTranslate
397fd224080515d4001a1bc60c8fed53e3c56b6f
Published
Jun 29, 2026
Tracked Since
Jun 29, 2026