CVE-2026-26015
CVE-2026-26015 is a critical-severity vulnerability in Arc53 Docsgpt with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v4: 10.0
- EPSS exploit prediction: 1% (64th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-26258
- Weakness: CWE-77
- Affected product: Arc53 Docsgpt
- Published:
- Last modified:
Description
DocsGPT is a GPT-powered chat for documentation. From version 0.15.0 to before version 0.16.0, an attacker accessing both the official DocsGPT website or any local and public deployment, can craft a malicious payload bypassing the "MCP test" behavior to achieve arbitrary remote code execution (RCE). This issue has been patched in version 0.16.0.
Frequently asked questions
- What is CVE-2026-26015?
- DocsGPT is a GPT-powered chat for documentation. From version 0.15.0 to before version 0.16.0, an attacker accessing both the official DocsGPT website or any local and public deployment, can craft a malicious payload bypassing the "MCP test" behavior to achieve arbitrary remote code execution (RCE). This issue has been patched in version 0.16.0.
- How severe is CVE-2026-26015?
- CVE-2026-26015 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-26015 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-26015?
- CVE-2026-26015 affects Arc53 Docsgpt. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-26015?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-26015 have an EU (EUVD) identifier?
- Yes. CVE-2026-26015 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26258.
- When was CVE-2026-26015 published?
- CVE-2026-26015 was published on 2026-04-29 and last updated on 2026-06-17.
References
- https://github.com/arc53/DocsGPT/releases/tag/0.16.0
- https://github.com/arc53/DocsGPT/security/advisories/GHSA-gcrq-f296-2j74
- https://www.ox.security/blog/mcp-supply-chain-advisory-rce-vulnerabilities-across-the-ai-ecosystem/
- https://www.ox.security/blog/the-mother-of-all-ai-supply-chains-critical-systemic-vulnerability-at-the-core-of-the-mcp/
Affected products (1)
- cpe:2.3:a:arc53:docsgpt:0.15.0:*:*:*:*:*:*:*
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