How severe is CVE-2026-34371?

CVE-2026-34371 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-34371 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34371?

CVE-2026-34371 affects Librechat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34371?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-34371 have an EU (EUVD) identifier?

Yes. CVE-2026-34371 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19946.

When was CVE-2026-34371 published?

CVE-2026-34371 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-34371

CVE-2026-34371 is a medium-severity vulnerability in Librechat with a CVSS 3.x base score of 6.3. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19946
Weakness: CWE-22
Affected product: Librechat
Published: 2026-04-07
Last modified: 2026-06-17

Description

LibreChat is a ChatGPT clone with additional features. Prior to 0.8.4, LibreChat trusts the name field returned by the execute_code sandbox when persisting code-generated artifacts. On deployments using the default local file strategy, a malicious artifact filename containing traversal sequences (for example, ../../../../../app/client/dist/poc.txt) is concatenated into the server-side destination path and written with fs.writeFileSync() without sanitization. This gives any user who can trigger execute_code an arbitrary file write primitive as the LibreChat server user. This vulnerability is fixed in 0.8.4.

Frequently asked questions

What is CVE-2026-34371?: LibreChat is a ChatGPT clone with additional features. Prior to 0.8.4, LibreChat trusts the name field returned by the execute_code sandbox when persisting code-generated artifacts. On deployments using the default local file strategy, a malicious artifact filename containing traversal sequences (for example, ../../../../../app/client/dist/poc.txt) is concatenated into the server-side destination path and written with fs.writeFileSync() without sanitization. This gives any user who can trigger execute_code an arbitrary file write primitive as the LibreChat server user. This vulnerability is fixed in 0.8.4.
How severe is CVE-2026-34371?: CVE-2026-34371 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-34371 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34371?: CVE-2026-34371 affects Librechat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34371?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34371 have an EU (EUVD) identifier?: Yes. CVE-2026-34371 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19946.
When was CVE-2026-34371 published?: CVE-2026-34371 was published on 2026-04-07 and last updated on 2026-06-17.

References

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-qrm5-r67f-6692

Affected products (1)

cpe:2.3:a:librechat:librechat:*:*:*:*:*:*:*:*

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