CVE Explorer

CVE-2026-31943

LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.3, `isPrivateIP()` in `packages/api/src/auth/domain.ts` fails to detect IPv4-mapped IPv6 addresses in their hex-normalized form, allowing any authenticated user to bypass SSRF protection and make the server issue HTTP requests to internal network resources — including cloud metadata services (e.g., AWS `169.254.169.254`), loopback, and RFC1918 ranges. Version 0.8.3 fixes the issue.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4b1eb95ba463cd1d4179a78b97ce140087c595475bd4b0b0b877bcddecbad1fa

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"LibreChat","vendor":"danny-avila","versions":[{"status":"affected","version":"< 0.8.3"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:6c3407f1e4bc17e2176f24566527e664344340595790217e16861a9de0ad0a4f · sha256:69800e7dad48b199… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:6c3407f1e4bc17e2176f24566527e664344340595790217e16861a9de0ad0a4f · sha256:69800e7dad48b199… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:6c3407f1e4bc17e2176f24566527e664344340595790217e16861a9de0ad0a4f · sha256:69800e7dad48b199… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"tags":["exploit"],"url":"https://github.com/danny-avila/LibreChat/security/advisories/GHSA-w5r7-4f94-vp4c"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:6c3407f1e4bc17e2176f24566527e664344340595790217e16861a9de0ad0a4f · sha256:69800e7dad48b199… · /containers/adp/0/references/0

{"name":"https://github.com/danny-avila/LibreChat/security/advisories/GHSA-w5r7-4f94-vp4c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/danny-avila/LibreChat/security/advisories/GHSA-w5r7-4f94-vp4c"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:6c3407f1e4bc17e2176f24566527e664344340595790217e16861a9de0ad0a4f · sha256:69800e7dad48b199… · /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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