How severe is CVE-2025-8848?

CVE-2025-8848 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-8848 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-8848?

CVE-2025-8848 affects Librechat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-8848?

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

Does CVE-2025-8848 have an EU (EUVD) identifier?

Yes. CVE-2025-8848 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35577.

When was CVE-2025-8848 published?

CVE-2025-8848 was published on 2025-10-22 and last updated on 2026-06-17.

CVE-2025-8848

CVE-2025-8848 is a medium-severity vulnerability in Librechat with a CVSS 3.x base score of 5.4. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-35577
Weakness: CWE-79
Affected product: Librechat
Published: 2025-10-22
Last modified: 2026-06-17

Description

A vulnerability in danny-avila/librechat version 0.7.9 allows for HTML injection via the Accept-Language header. When a logged-in user sends an HTTP GET request with a crafted Accept-Language header, arbitrary HTML can be injected into the <html lang=""> tag of the response. This can lead to potential security risks such as cross-site scripting (XSS) attacks.

Frequently asked questions

What is CVE-2025-8848?: A vulnerability in danny-avila/librechat version 0.7.9 allows for HTML injection via the Accept-Language header. When a logged-in user sends an HTTP GET request with a crafted Accept-Language header, arbitrary HTML can be injected into the <html lang=""> tag of the response. This can lead to potential security risks such as cross-site scripting (XSS) attacks.
How severe is CVE-2025-8848?: CVE-2025-8848 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-8848 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-8848?: CVE-2025-8848 affects Librechat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-8848?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-8848 have an EU (EUVD) identifier?: Yes. CVE-2025-8848 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35577.
When was CVE-2025-8848 published?: CVE-2025-8848 was published on 2025-10-22 and last updated on 2026-06-17.

References

https://huntr.com/bounties/a05ebc1f-882a-4adc-b178-d3cefa4b730e

Affected products (1)

cpe:2.3:a:librechat:librechat:0.7.9:-:*:*:*:*:*:*

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