CVE-2026-63449

LOW

3.7

CVSS v3

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, the SIP parser in rust/src/sip/parser.rs stores request and response body lengths in 16-bit fields. A SIP body larger than 65,536 bytes can truncate the length and prevent frame:request.body or frame:response.body from exposing the complete body to inspection, allowing content in the omitted portion to evade frame-based detection. This issue is fixed in version 8.0.6.

CWE-197

How to fix

Remediation Available

suricataDebian

Fixed in:1:8.0.6-1CVE-2026-63449

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Exploit Intelligence

0.24%probability of exploitation in 30 days

16thpercentile

Low risk: more likely to be exploited than 16% of all known CVEs.

References

Other references6

Related Vulnerabilities

Other CWE-197 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-42475	Critical	9.8	99%	KEV + Ransom	Fix
CVE-2025-6965	High	7.7	73%	-	Fix
CVE-2024-21310	High	7.8	12%	-	Fix
CVE-2024-43639	Critical	9.8	8.9%	-	Fix
CVE-2024-38125	High	7.8	5.9%	-	Fix
CVE-2024-28944	High	8.8	2.4%	-	Fix

Common questions

How do I fix CVE-2026-63449?

Upgrade suricata on debian unstable to 1:8.0.6-1 or later.

Is CVE-2026-63449 being actively exploited?

Not that we know of. CVE-2026-63449 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.24% is the estimated probability that it will be exploited in the next 30 days. That is higher than 16% of all scored CVEs.

How severe is CVE-2026-63449?

CVE-2026-63449 has a CVSS v3 base score of 3.7, rated low. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-63449 affect?

Published advisories record a fix for suricata (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-18.