How severe is CVE-2026-32128?

CVE-2026-32128 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-32128 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-32128?

CVE-2026-32128 affects Fastgpt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-32128?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-32128 have an EU (EUVD) identifier?

Yes. CVE-2026-32128 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11408.

When was CVE-2026-32128 published?

CVE-2026-32128 was published on 2026-03-11 and last updated on 2026-06-17.

CVE-2026-32128

CVE-2026-32128 is a medium-severity vulnerability in Fastgpt with a CVSS 3.x base score of 6.3. 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-184.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-11408
Weakness: CWE-184
Affected product: Fastgpt
Published: 2026-03-11
Last modified: 2026-06-17

Description

FastGPT is an AI Agent building platform. In 4.14.7 and earlier, FastGPT's Python Sandbox (fastgpt-sandbox) includes guardrails intended to prevent file writes (static detection + seccomp). These guardrails are bypassable by remapping stdout (fd 1) to an arbitrary writable file descriptor using fcntl. After remapping, writing via sys.stdout.write() still satisfies the seccomp rule write(fd==1), enabling arbitrary file creation/overwrite inside the sandbox container despite the intended no file writes restriction.

Frequently asked questions

What is CVE-2026-32128?: FastGPT is an AI Agent building platform. In 4.14.7 and earlier, FastGPT's Python Sandbox (fastgpt-sandbox) includes guardrails intended to prevent file writes (static detection + seccomp). These guardrails are bypassable by remapping stdout (fd 1) to an arbitrary writable file descriptor using fcntl. After remapping, writing via sys.stdout.write() still satisfies the seccomp rule write(fd==1), enabling arbitrary file creation/overwrite inside the sandbox container despite the intended no file writes restriction.
How severe is CVE-2026-32128?: CVE-2026-32128 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-32128 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32128?: CVE-2026-32128 affects Fastgpt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-32128?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-32128 have an EU (EUVD) identifier?: Yes. CVE-2026-32128 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11408.
When was CVE-2026-32128 published?: CVE-2026-32128 was published on 2026-03-11 and last updated on 2026-06-17.

References

https://github.com/labring/FastGPT/security/advisories/GHSA-6hw6-mxrm-v6wj

Affected products (1)

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

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