🛡️ CVE-2026-40217 — litellm

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs administrative privileges on the target. No user interaction is required. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
• Attack requirements: None — no deployment-specific condition has to hold.
• Privileges required: High — administrative rights are needed first.
• User interaction: None — nobody has to be tricked into anything.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-40217 is classified as CWE-420: Unprotected Alternate Channel. The product protects a primary channel, but it does not use the same level of protection for an alternate channel.

Affected software

CVE-2026-40217 is recorded against 1 package.

• litellm (from 1.81.8 up to 1.83.10)

Timeline and source

Published on 13 July 2026 and last revised on 15 July 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Package)
github.com (Web)
www.x41-dsec.de (Web)
pypi.org (Package)
github.com (Advisory)

Other advisories for this package

litellm has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CGA-f262-9ccg-28jj (published 9 Aug 2026)
• CGA-r42g-whw4-9h4c (published 9 Aug 2026)
• CGA-g67v-j9r6-8vjv (published 4 Aug 2026)
• CGA-pvh5-q2h5-qv7h (published 29 Jul 2026)
• CGA-758r-j93j-96xq (published 29 Jul 2026)
• CGA-6wpr-q7mq-mm2f (published 29 Jul 2026)
• CGA-h625-7cf3-469m (published 29 Jul 2026)
• ECHO-4543-9144-2cc5 (published 24 Jul 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-420: Unprotected Alternate Channel) in other software:

• CVE-2025-67303 (8.0 High, published 22 Jun 2026)
• CVE-2026-40435 (5.3 Medium, published 13 May 2026)
• CVE-2026-43505 (6.5 Medium, published 1 May 2026)
• GHSA-3926-2jvf-fg29 (8.0 High, published 10 Apr 2026)
• CVE-2026-35388 (2.5 Low, published 2 Apr 2026)
• CVE-2026-25916 (4.3 Medium, published 9 Feb 2026)
• CVE-2025-41727 (7.8 High, published 27 Jan 2026)
• GHSA-2hc9-cc65-xwj8 (8.0 High, published 5 Jan 2026)

Details

Affected Packages

References