How severe is CVE-2026-22263?

CVE-2026-22263 has a CVSS 3.x base score of 5.3, rated medium 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 low.

Is CVE-2026-22263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22263?

CVE-2026-22263 affects Oisf Suricata. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22263?

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

Does CVE-2026-22263 have an EU (EUVD) identifier?

Yes. CVE-2026-22263 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4771.

When was CVE-2026-22263 published?

CVE-2026-22263 was published on 2026-01-27 and last updated on 2026-06-17.

CVE-2026-22263

CVE-2026-22263 is a medium-severity vulnerability in Oisf Suricata with a CVSS 3.x base score of 5.3. 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-1050.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4771
Weakness: CWE-1050
Affected product: Oisf Suricata
Published: 2026-01-27
Last modified: 2026-06-17

Description

Suricata is a network IDS, IPS and NSM engine. Starting in version 8.0.0 and prior to version 8.0.3, inefficiency in http1 headers parsing can lead to slowdown over multiple packets. Version 8.0.3 patches the issue. No known workarounds are available.

Frequently asked questions

What is CVE-2026-22263?: Suricata is a network IDS, IPS and NSM engine. Starting in version 8.0.0 and prior to version 8.0.3, inefficiency in http1 headers parsing can lead to slowdown over multiple packets. Version 8.0.3 patches the issue. No known workarounds are available.
How severe is CVE-2026-22263?: CVE-2026-22263 has a CVSS 3.x base score of 5.3, rated medium 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 low.
Is CVE-2026-22263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22263?: CVE-2026-22263 affects Oisf Suricata. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22263?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-22263 have an EU (EUVD) identifier?: Yes. CVE-2026-22263 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4771.
When was CVE-2026-22263 published?: CVE-2026-22263 was published on 2026-01-27 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Oisf Suricata

CVE-2023-35853 — Critical (CVSS 9.8): In Suricata before 6.0.13, an adversary who controls an external source of Lua rules may be able to execute Lua code.…
CVE-2021-37592 — Critical (CVSS 9.8): Suricata before 5.0.8 and 6.x before 6.0.4 allows TCP evasion via a client with a crafted TCP/IP stack that can send a…
CVE-2018-10244 — Critical (CVSS 9.8): Suricata version 4.0.4 incorrectly handles the parsing of an EtherNet/IP PDU. A malformed PDU can cause the parsing…
CVE-2019-18792 — Critical (CVSS 9.1): An issue was discovered in Suricata 5.0.0. It is possible to bypass/evade any tcp based signature by overlapping a TCP…
CVE-2026-31937 — High (CVSS 7.5): Suricata is a network IDS, IPS and NSM engine. Prior to version 7.0.15, inefficiency in DCERPC buffering can lead to a…
CVE-2026-31935 — High (CVSS 7.5): Suricata is a network IDS, IPS and NSM engine. Prior to versions 7.0.15 and 8.0.4, flooding of craft HTTP2 continuation…

All CVEs affecting Oisf Suricata →

Other CWE-1050 vulnerabilities

CVE-2026-4634 — High (CVSS 7.5): A flaw was found in Keycloak. An unauthenticated attacker can exploit this vulnerability by sending a specially crafted…
CVE-2025-67419 — High (CVSS 7.5): A Denial of Service (DoS) vulnerability in evershop 2.1.0 and prior allows unauthenticated attackers to exhaust the…
CVE-2025-48866 — High (CVSS 7.5): ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions…
CVE-2025-47947 — High (CVSS 7.5): ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions…
CVE-2024-4068 — High (CVSS 7.5): The NPM package `braces`, versions prior to 3.0.3, fails to limit the number of characters it can handle, which could…
CVE-2023-1390 — High (CVSS 7.5): A remote denial of service vulnerability was found in the Linux kernel’s TIPC kernel module. The while loop in…

Browse all CWE-1050 vulnerabilities →