How severe is CVE-2026-31935?

CVE-2026-31935 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-2026-31935 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-31935?

CVE-2026-31935 affects Oisf Suricata. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-31935?

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-2026-31935 have an EU (EUVD) identifier?

Yes. CVE-2026-31935 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18245.

When was CVE-2026-31935 published?

CVE-2026-31935 was published on 2026-04-02 and last updated on 2026-06-17.

CVE-2026-31935

CVE-2026-31935 is a high-severity vulnerability in Oisf Suricata 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18245
Weakness: CWE-400
Affected product: Oisf Suricata
Published: 2026-04-02
Last modified: 2026-06-17

Description

Suricata is a network IDS, IPS and NSM engine. Prior to versions 7.0.15 and 8.0.4, flooding of craft HTTP2 continuation frames can lead to memory exhaustion, usually resulting in the Suricata process being shut down by the operating system. This issue has been patched in versions 7.0.15 and 8.0.4.

Frequently asked questions

What is CVE-2026-31935?: Suricata is a network IDS, IPS and NSM engine. Prior to versions 7.0.15 and 8.0.4, flooding of craft HTTP2 continuation frames can lead to memory exhaustion, usually resulting in the Suricata process being shut down by the operating system. This issue has been patched in versions 7.0.15 and 8.0.4.
How severe is CVE-2026-31935?: CVE-2026-31935 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-2026-31935 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-31935?: CVE-2026-31935 affects Oisf Suricata. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-31935?: 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-2026-31935 have an EU (EUVD) identifier?: Yes. CVE-2026-31935 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18245.
When was CVE-2026-31935 published?: CVE-2026-31935 was published on 2026-04-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*

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