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CVE-2026-54027

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the POST /api/files/images endpoint allows any authenticated user to upload files into any agent's tool_resources (e.g., context, execute_code) without verifying ownership or EDIT permission on the target agent. A permission check was added to the POST /api/files route in a previous patch, but the image upload route was never updated with the same check. An attacker can simply use the image endpoint i
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:11147923acf2a8a0a770cb8e78c12beb089929c821fe1edd45803fb8b3be953c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"LibreChat","vendor":"danny-avila","versions":[{"status":"affected","version":"< 0.8.4-rc1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1a96db6006e09bd6a9497a411398e5e6309b6413b407647cf47dde620db0e5b9 · sha256:63778c38a16d4709… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1a96db6006e09bd6a9497a411398e5e6309b6413b407647cf47dde620db0e5b9 · sha256:63778c38a16d4709… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a96db6006e09bd6a9497a411398e5e6309b6413b407647cf47dde620db0e5b9 · sha256:63778c38a16d4709… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/danny-avila/LibreChat/security/advisories/GHSA-c55r-p24w-hcj5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a96db6006e09bd6a9497a411398e5e6309b6413b407647cf47dde620db0e5b9 · sha256:63778c38a16d4709… · /containers/adp/0/references/0
{"name":"https://github.com/danny-avila/LibreChat/security/advisories/GHSA-c55r-p24w-hcj5","tags":["x_refsource_CONFIRM"],"url":"https://github.com/danny-avila/LibreChat/security/advisories/GHSA-c55r-p24w-hcj5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a96db6006e09bd6a9497a411398e5e6309b6413b407647cf47dde620db0e5b9 · sha256:63778c38a16d4709… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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