CVE-2026-57942: LibreTranslate · Use of Less Trusted Source
Affects LibreTranslateSource CVE Database V5
Public exploit available · CVSS 6.9 Medium.
Data as of 8 Nov 2026, 14:47 UTC
Thin evidence
One scorer or none| CNA (VulnCheck) | CVSS 4.0 | 6.9 |
|---|---|---|
| CNA (VulnCheck) | CVSS 3.1 | 5.3 |
- CISA SSVC
- Exploitation
- Proof of concept is public or traded
- Automatable
- Attackers can reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-06-29.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 29 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
CISA SSVC: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by VulnCheck
, 3 days before disclosure
CVE published
on cve.org
, t = 0
CISA SSVC assessment
proof of concept public
, 1 hour after disclosure
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA SSVC, the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LibreTranslateLibreTranslate | Affected
| Fixed in– |
PyPILibreTranslatepkg:pypi/LibreTranslateOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available and was implemented in commit 397fd22. Users should upgrade LibreTranslate to a version that includes this commit to remediate the vulnerability. Until upgraded, administrators should consider additional network-level protections or proxy validation to mitigate spoofing risks.
Description
CVE-2026-57942 is an IP spoofing vulnerability in LibreTranslate versions up to 1.9.7. The flaw exists in the get_remote_address() function, which fails to properly validate the X-Forwarded-For header from untrusted sources. This allows unauthenticated attackers to spoof client IP addresses, bypassing per-IP rate limiting and flood bans, potentially enabling unlimited API abuse. The issue was fixed in a commit identified as 397fd22.
References
- github.com/LibreTranslate/LibreTranslate/issues/986 (opens in a new tab)
- github.com/LibreTranslate/LibreTranslate/pull/987 (opens in a new tab)
- github.com/LibreTranslate/LibreTranslate/commit/397fd224080515d4001a1bc60c8fed53e3c56b6f (opens in a new tab)
- vulncheck.com/advisories/libretranslate-ip-spoofing-via-x-forwarded-for-header (opens in a new tab)