How severe is CVE-2026-40352?

CVE-2026-40352 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-40352 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40352?

CVE-2026-40352 affects Fastgpt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40352?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-40352 have an EU (EUVD) identifier?

Yes. CVE-2026-40352 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23559.

When was CVE-2026-40352 published?

CVE-2026-40352 was published on 2026-04-17 and last updated on 2026-06-17.

CVE-2026-40352

CVE-2026-40352 is a high-severity vulnerability in Fastgpt with a CVSS 3.x base score of 8.8. 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-943.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23559
Weakness: CWE-943
Affected product: Fastgpt
Published: 2026-04-17
Last modified: 2026-06-17

Description

FastGPT is an AI Agent building platform. In versions prior to 4.14.9.5, the password change endpoint is vulnerable to NoSQL injection. An authenticated attacker can bypass the "old password" verification by injecting MongoDB query operators. This allows an attacker who has gained a low-privileged session to change the password of their account (or others if combined with ID manipulation) without knowing the current one, leading to full account takeover and persistence. This issue has been fixed in version 4.14.9.5.

Frequently asked questions

What is CVE-2026-40352?: FastGPT is an AI Agent building platform. In versions prior to 4.14.9.5, the password change endpoint is vulnerable to NoSQL injection. An authenticated attacker can bypass the "old password" verification by injecting MongoDB query operators. This allows an attacker who has gained a low-privileged session to change the password of their account (or others if combined with ID manipulation) without knowing the current one, leading to full account takeover and persistence. This issue has been fixed in version 4.14.9.5.
How severe is CVE-2026-40352?: CVE-2026-40352 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-40352 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40352?: CVE-2026-40352 affects Fastgpt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40352?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-40352 have an EU (EUVD) identifier?: Yes. CVE-2026-40352 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23559.
When was CVE-2026-40352 published?: CVE-2026-40352 was published on 2026-04-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fastgpt:fastgpt:*:*:*:*:*:*:*:*

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