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Vulnerabilities

Security incident · GHSA-hhww-mrg2-969h

LiteLLM vulnerable to reflected XSS in /sso/debug/callback

Published Oct 27, 2026 · catalog updated Oct 27, 2026 · LiteLLM vulnerable to reflected

Last checked Oct 27, 2026, 9 days ago.

Open the advisory

Exploitation likelihood is not on this record for GHSA-hhww-mrg2-969h. A missing EPSS score is not a low risk. Compare LiteLLM vulnerable to reflected with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (LiteLLM vulnerable to reflected).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Medium6.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Version ranges on file
Affected products
pip litellm

### Summary The endpoint reflected identity-provider-controlled fields into an inline block via , which escapes JSON string syntax but not HTML context characters such as . An IdP-returned string field containing (for example a user-editable display name) closed the script block and executed attacker JavaScript in the proxy's origin. ### Impact Reflected XSS on the LiteLLM proxy origin. The route required no authentication, so an attacker with an account on the configured IdP whose claims pass such strings through verbatim could complete the SSO flow themselves and deliver the resulting callback URL to a logged-in proxy admin. Scripts executing in the proxy origin can read the dashboard session cookie and act with the victim's privileges, up to full admin account takeover.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • pip litellm>= 1.65.5, < 1.85.0

How to fix GHSA-hhww-mrg2-969h

  • Upgrade

    GHSA-hhww-mrg2-969h lists a fix boundary at 1.85.0. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 1.85.0

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for GHSA-hhww-mrg2-969h. A missing EPSS score is not a low risk. Compare LiteLLM vulnerable to reflected with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with >= 1.65.5, < 1.85.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 27, 2026 · GitHub Advisory Database

    Detected

    ### Summary The endpoint reflected identity-provider-controlled fields into an inline block via , which escapes JSON string syntax but not HTML context characters such as . An IdP-returned string field containing (for example a user-editable display name) closed the script block and executed attacker JavaScript in the proxy's origin. ### Impact Reflected XSS on the LiteLLM proxy origin. The route

  2. Oct 27, 2026 · GitHub Advisory Database

    Updated

    ### Summary The endpoint reflected identity-provider-controlled fields into an inline block via , which escapes JSON string syntax but not HTML context characters such as . An IdP-returned string field containing (for example a user-editable display name) closed the script block and executed attacker JavaScript in the proxy's origin. ### Impact Reflected XSS on the LiteLLM proxy origin. The route

Sources

References

Freshness

Last verified in this catalog Oct 27, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • GitHub Advisory DatabaseOct 27, 2026