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CVE-2026-57226: Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring

35
This week
LOW 3.7REMOTEUPGRADE

CVE-2026-57226 is a low-severity flaw (CVSS 3.7) affecting suricata. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.17 and 8.0.6, HTTP SWF decompression with the non-default swf-decompression feature and an unsafe decompress-depth can use the configured depth when allocating in src/util-file-decompression.c instead of limiting the allocation to the Flash file's actual data requirement. A crafted SWF response can therefore trigger a

Why this priority

  • Public exploit reference
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score3.7 (Low)
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges neededNone
User interactionNone
EPSS exploit chance0.6% (top 52%)
CISA exploited listNo
WeaknessCWE-122, CWE-190
Published2026-09-18
Last modified2026-09-28
Publisher (CNA): GitHub, Inc. · Vendor: oisf

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Last updated 2026-09-28 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

oisf suricata UPGRADE
Affected: < 7.0.17 · >= 8.0.0 and < 8.0.6
Fixed in: 7.0.17, 8.0.6
Safe to downgrade to: a release before 8.0.0
1. Check installed version
apt-cache policy suricata || rpm -q suricata || suricata --version
2. UPGRADE to 7.0.17 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade suricata
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade suricata
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 8.0.0 (Debian / Ubuntu)
apt-cache madison suricata sudo apt install suricata=<VERSION_BEFORE_8.0.0> sudo apt-mark hold suricata
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list suricata sudo dnf downgrade suricata-<VERSION_BEFORE_8.0.0> sudo dnf versionlock add suricata
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-57226?

suricata: upgrade to 7.0.17, 8.0.6. Exact commands for each OS are on this page.

Is CVE-2026-57226 being exploited?

CVE-2026-57226 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-57226 affect?

CVE-2026-57226 affects suricata. Severity is low (CVSS 3.7). Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.17 and 8.0.6, HTTP SWF decompression with the non-default swf-decompression feature and an unsafe decompress-

How urgent is CVE-2026-57226?

Priority 35/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Suricata and Snort vulnerabilities

Related CVEs

References

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