CVE-2025-8849 json
Denial of Service in danny-avila/librechat
published 2025-10-30 12 mo ago modified 2026-10-07 32 d ago also EUVD-2025-37228
- cvss
- 5.4
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 28%
- public exploits
- 0
- none known
Summary
LibreChat version 0.7.9 is vulnerable to a Denial of Service (DoS) attack due to unbounded parameter values in the `/api/memories` endpoint. The `key` and `value` parameters accept arbitrarily large inputs without proper validation, leading to a null pointer error in the Rust-based backend when excessively large values are submitted. This results in the inability to create new memories, impacting the stability of the service.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 12 mo ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- huntr.com https://huntr.com/bounties/e9d9404c-cd19-4226-a580-9cba14b7d7d6 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 5.4 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- danny-avila danny-avila/librechat
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
github.com
/danny-avila/librechat/commit/edf33bedcbb08c33e59df76f06454ed7efd896f9
patch
-
huntr.com
/bounties/e9d9404c-cd19-4226-a580-9cba14b7d7d6
exploit, mitigation, third-party-advisory
Sources
- CVE List CVE-2025-8849
- NVD CVE-2025-8849
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.