CVE-2026-4276
CVE-2026-4276 is a high-severity vulnerability in Librechat with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 0% (20th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-12454
- Weakness: CWE-94
- Affected product: Librechat
- Published:
- Last modified:
Description
LibreChat RAG API, version 0.7.0, contains a log-injection vulnerability that allows attackers to forge log entries.
Frequently asked questions
- What is CVE-2026-4276?
- LibreChat RAG API, version 0.7.0, contains a log-injection vulnerability that allows attackers to forge log entries.
- How severe is CVE-2026-4276?
- CVE-2026-4276 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
- Is CVE-2026-4276 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-4276?
- CVE-2026-4276 affects Librechat. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-4276?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-4276 have an EU (EUVD) identifier?
- Yes. CVE-2026-4276 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12454.
- When was CVE-2026-4276 published?
- CVE-2026-4276 was published on 2026-03-16 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:librechat:librechat:0.7.0:*:*:*:*:*:*:*
More vulnerabilities in Librechat
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- CVE-2024-41703 — Critical (CVSS 9.8): LibreChat through 0.7.4-rc1 has incorrect access control for message updates.
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- CVE-2026-22252 — Critical (CVSS 9.1): LibreChat is a ChatGPT clone with additional features. Prior to v0.8.2-rc2, LibreChat's MCP stdio transport accepts…
- CVE-2025-69222 — Critical (CVSS 9.1): LibreChat is a ChatGPT clone with additional features. Version 0.8.1-rc2 is prone to a server-side request forgery…
- CVE-2024-10361 — Critical (CVSS 9.1): An arbitrary file deletion vulnerability exists in danny-avila/librechat version v0.7.5-rc2, specifically within the…
All CVEs affecting Librechat →
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