9.1

CVE-2026-45764: oisf suricata Type Confusion

CVSS: 9.1v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-45764DEBIAN-CVE-2026-45764
Published 10-09-2026Last modified 11-09-2026
Open JSON

Vulnerability summary

CVE-2026-45764 is a critical (CVSS 9.1) Type Confusion vulnerability in oisf suricata. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49.6% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.63%
0%100%
Low · +0.21 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:10885-1

Timeline

  1. 10-09-2026
    PublishedVulnerability first disclosed.
  2. 11-09-2026
    Last modifiedVulnerability information updated.

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.63%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

+0.21 pp

From 0.43% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.63%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • suricataAll versions (No fix recorded) | < 1:8.0.5-1
Oisf1 product
  • suricata< 7.0.16 | ≥ 7.0.0, < 7.0.16 | ≥ 8.0.0, < 8.0.5
Ubuntu1 product
  • suricataAll versions (No fix recorded)

3 vendors · 3 products

References

10 links