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VulnerabilityCVE-2026-91201Published 2026-09-14

CVE-2026-91201 — arc53 DocsGPT

medium

As of 2026-09-14, CVE-2026-91201 is a MEDIUM-severity vulnerability in arc53 DocsGPT, CVSS v3.1 5.4, EPSS 0.1% (3.6th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-91201 as of 2026-09-14; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

CVSS v3.1
5.4/10Medium
EPSS
0.1%Higher than 3.6% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
0None linked yet
Priority
2.8/10Threadlinqs triage score
Published
CVSS v3.1 5.4 (MEDIUM) · CVSS v4.0 5.3 · EPSS 0.1% (higher than 3.6% of all scored CVEs) · Priority 2.8/10 · Published 2026-09-14

Last updated:

What is CVE-2026-91201?

DocsGPT through 0.20.0 posts OAuth connector session tokens to a wildcard target origin in the callback-status endpoint without validating sender origin. Attackers can obtain session tokens and provider account emails by acting as window.opener during OAuth authorization, then use tokens to disconnect victims' cloud storage connectors.

The record classifies CVE-2026-91201 under weakness class CWE-346. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 21 days ago.

Severity and exploitation probability

CVSS v3.1 base score
5.4 — MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
CVSS v4.0 base score
5.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS (FIRST)
0.1% probability of exploitation in the next 30 days, higher than 3.6% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
2.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-09-14

Is CVE-2026-91201 being exploited?

It currently carries a trending score of 31 in the Threadlinqs vulnerability feed.

Affected products and versions

  • arc53: DocsGPT

How to fix CVE-2026-91201

No vendor patch reference has been recorded for CVE-2026-91201 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-91201

No threat campaign in the Threadlinqs corpus currently references CVE-2026-91201, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Technical analysis

Third-party advisory

Issue tracking and product pages