How severe is CVE-2026-41040?

CVE-2026-41040 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-41040 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-41040?

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-2026-41040 have an EU (EUVD) identifier?

Yes. CVE-2026-41040 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25199.

When was CVE-2026-41040 published?

CVE-2026-41040 was published on 2026-04-23 and last updated on 2026-06-17.

CVE-2026-41040

CVE-2026-41040 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. 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-1333.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25199
Weakness: CWE-1333
Published: 2026-04-23
Last modified: 2026-06-17

Description

GROWI provided by GROWI, Inc. is vulnerable to a regular expression denial of service (ReDoS) via a crafted input string.

Frequently asked questions

What is CVE-2026-41040?: GROWI provided by GROWI, Inc. is vulnerable to a regular expression denial of service (ReDoS) via a crafted input string.
How severe is CVE-2026-41040?: CVE-2026-41040 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-41040 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-41040?: 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-2026-41040 have an EU (EUVD) identifier?: Yes. CVE-2026-41040 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25199.
When was CVE-2026-41040 published?: CVE-2026-41040 was published on 2026-04-23 and last updated on 2026-06-17.

References

Other CWE-1333 vulnerabilities

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CVE-2025-6998 — High (CVSS 8.7): ReDoS in strip_whitespaces() function in cps/string_helper.py in Calibre Web and Autocaliweb allows unauthenticated…

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