CVE-2026-93355

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-28. The CNA's CVSS baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 4 sources updated this weekElevated
8.1EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 8.1Exploit: Elevated riskExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

LiteLLM contains a weak authentication vulnerability that allows an attacker holding a valid JWT from the configured identity provider to authenticate as any existing user by exploiting an email-based fallback lookup in the JWT authentication flow without verifying the email_verified claim. Attackers can present a token with an unverified email address matching a victim's account to inherit the victim's role, including proxy_admin privileges, and permanently overwrite the victim's stored identity binding to retain persistent unauthorized access to administrative endpoints exposing API keys and user management.

CVSS v3
8.1
EG Score
8.1HIGHhigh confidence
EG Risk
52
EG Risk 52/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
17th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 28, 2026

Last Modified

October 1, 2026

Advisory Details (2)

Auto-updated Sep 28, 2026
No patch confirmed yet.
generic

LiteLLM Weak JWT Authentication via Email-Based User Lookup | Advisories | VulnCheck

https://www.vulncheck.com/advisories/litellm-weak-jwt-authentication-via-email-based-user-lookup
generic

LiteLLM: an ordinary login token can become someone else’s admin account | OX Security

https://www.ox.security/blog/litellm-an-ordinary-login-token-can-become-someone-elses-admin-account/

Vendor Advisories for CVE-2026-93355(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 31× in last 7d / 31× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 03:37 UTCEG score recompute
  2. 2026-10-05 03:37 UTCGHSA enrichment
  3. 2026-10-04 23:23 UTCEPSS rescore
  4. 2026-10-04 15:36 UTCGHSA enrichment
  5. 2026-10-04 03:34 UTCGHSA enrichment
  6. 2026-10-03 15:33 UTCEG score recompute
  7. 2026-10-03 15:33 UTCGHSA enrichment
  8. 2026-10-03 14:26 UTCEPSS rescore
  9. 2026-10-03 03:31 UTCEG score recompute
  10. 2026-10-03 03:31 UTCGHSA enrichment
  11. 2026-10-02 15:29 UTCGHSA enrichment
  12. 2026-10-02 03:27 UTCEG score recompute
  13. 2026-10-02 03:27 UTCGHSA enrichment
  14. 2026-10-01 19:51 UTCEPSS rescore
  15. 2026-10-01 15:26 UTCEG score recompute
  16. 2026-10-01 15:26 UTCGHSA enrichment
  17. 2026-10-01 05:27 UTCGHSA enrichment
  18. 2026-09-30 17:26 UTCGHSA enrichment
  19. 2026-09-30 16:16 UTCEG score recompute
  20. 2026-09-30 16:16 UTCGHSA enrichment
  21. 2026-09-30 15:04 UTCEPSS rescore
  22. 2026-09-30 03:28 UTCGHSA enrichment
  23. 2026-09-29 15:25 UTCEG score recompute
  24. 2026-09-29 15:25 UTCGHSA enrichment
  25. 2026-09-29 14:27 UTCEG score recompute
Show 6 more
  1. 2026-09-29 14:26 UTCGHSA enrichment
  2. 2026-09-29 08:31 UTCEG score recompute
  3. 2026-09-29 08:30 UTCGHSA enrichment
  4. 2026-09-28 20:29 UTCEG score recompute
  5. 2026-09-28 19:37 UTCEG score recompute
  6. 2026-09-28 19:36 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-93355?
CVE-2026-93355 is a high vulnerability published on September 28, 2026. LiteLLM contains a weak authentication vulnerability that allows an attacker holding a valid JWT from the configured identity provider to authenticate as any existing user by exploiting an email-based fallback lookup in the JWT authentication flow without verifying the emailverified claim.…
When was CVE-2026-93355 disclosed?
CVE-2026-93355 was first published on September 28, 2026, with the most recent update on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-93355 actively exploited?
CVE-2026-93355 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (17th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-93355?
CVE-2026-93355 has a CVSS base score of 8.1 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-93355?
No fix for CVE-2026-93355 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-93355 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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