Dashboard / CVE-2026-56104

CVE-2026-56104

HIGH
MEDIUM Priority: 0.04 BB Relevance: 68/100
Published: 2026-06-22 Modified: 2026-11-08 First seen: 2026-11-08 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: High
PR: Low
UI: None
AT: None
VC: High
VI: High
VA: None

Description

Chainlit before 2.10.1 contains a session hijacking vulnerability that allows unauthenticated attackers to restore and inherit authenticated user sessions by presenting a valid sessionId during WebSocket session restoration without ownership verification. Attackers can exploit the restore_existing_session path to assume a victim's permissions and roles, enabling unauthorized invocation of tools and access to data restricted to the authenticated victim.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
Chainlit chainlit 0 < 2.10.1

References & Advisories (4)

Bug Bounty Relevance

68 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

8.8 / 10.0 v4.0
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

EPSS — Exploitation Probability

0.42%
Raw Score 0.004170
Percentile 36.5%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00417
2026-11-12
0.00417
2026-11-10
0.00417
2026-11-09
0.00417
2026-11-08
0.00417

Intelligence Sources

mitre ref →

External Links