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CVE-2026-4276 LibreChat CVE debrief

CVE-2026-4276 is a high-severity vulnerability in LibreChat RAG API version 0.7.0. The vulnerability, which has a CVSS score of 7.5, allows attackers to forge log entries through a log-injection vulnerability. This vulnerability was published on [cvePublishedAt] and last modified on [cveModifiedAt].

Vendor
LibreChat
Product
RAG API
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-16
Original CVE updated
2026-06-05
Advisory published
2026-03-16
Advisory updated
2026-06-05

Who should care

Users of LibreChat RAG API version 0.7.0 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by a log-injection vulnerability in LibreChat RAG API version 0.7.0, which allows attackers to forge log entries. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Defensive priority

HIGH

Recommended defensive actions

  • Users should update to a patched version of LibreChat RAG API as soon as possible.
  • In the meantime, users can refer to [ref-4] and [ref-5] for mitigation strategies.

Evidence notes

The evidence for this vulnerability comes from the NVD and CVE.org.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-4276 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-4276

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-4276 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-4276

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.