VulnerabilityPublished 15 May 2026Updated 19 May 2026

CVE-2026-44553: open-webui · DEPRECATED: Insufficient Session Expiration

Affects open-webuiSource GCVE Database

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Not known to be exploited · CVSS 8.1 High : upgrade to 0.9.0 soon.

Data as of 12 Nov 2026, 00:19 UTC

CVSS 3.1 base score

8.1High

How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none

CVSS scores by source
CNA (GitHub_M)	CVSS 3.1	8.1

EPSS: 0.2% chance of exploitation in 30 days – higher than 20% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 0.9.0

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 15 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade open-webui to 0.9.0.

Affected software

Product	Affected	Fixed in
open-webui open-webui	Affected <0.9.0	Fixed in 0.9.0

AI-suggested

Upgrade Open WebUI to version 0.9.0 or later, where this vulnerability is fixed. No additional mitigation is required once the software is updated.

Description

Open WebUI versions prior to 0.9.0 contain a vulnerability where administrative role changes and user deletions do not properly disconnect affected Socket.IO sessions. This allows users whose admin privileges have been revoked to retain those privileges within their existing sessions until the connection is terminated. The issue is fixed in version 0.9.0.

Impact

Users who have had their administrative privileges revoked can continue to operate with admin rights within their existing Socket.IO sessions until those sessions are disconnected. This can lead to unauthorized administrative actions being performed despite role changes. The vulnerability has a high severity with a CVSS score of 8.1, indicating significant confidentiality and integrity impact but no availability impact.

Summary

CVE-2026-44553 describes an insufficient session expiration vulnerability (CWE-613) in Open WebUI, a self-hosted AI platform. Before version 0.9.0, when an administrative role is revoked or a user is deleted, the system fails to iterate through the SESSION_POOL to disconnect active Socket.IO sessions. Consequently, users retain their previous admin privileges in their active sessions as long as the connection remains alive through automatic heartbeats. This flaw affects only the Socket.IO session cache and is resolved in Open WebUI 0.9.0.

CWE-613DEPRECATED: Insufficient Session Expiration (opens in a new tab)
Base weaknessOWASP Top 10 A07:2025: Authentication Failures (opens in a new tab)
This entry has been deprecated because it was insufficiently clear. Consider CWE-1462 and its descendants.
MITRE does not allow mapping vulnerabilities to this entry; it groups weaknesses rather than naming one.
OWASP Cheat Sheets
OWASP Authentication (opens in a new tab)
OWASP ASVS 4.0.3
V2.8.1 (opens in a new tab)
V2.8.6 (opens in a new tab)
V3.6.1 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

github.com/open-webui/open-webui/security/advisories/GHSA-45m8-cpm2-3v65 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 12 Nov 2026, 00:19 UTC

WeaknessesCWE-613

Technical details

References

Community reviews

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