How severe is CVE-2026-63449?

CVE-2026-63449 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-63449 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-63449?

CVE-2026-63449 affects Oisf Suricata. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-63449?

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

When was CVE-2026-63449 published?

CVE-2026-63449 was published on 2026-09-18 and last updated on 2026-09-28.

CVE-2026-63449

CVE-2026-63449 is a low-severity vulnerability in Oisf Suricata with a CVSS 3.x base score of 3.7. 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-197.

Key facts

Severity: Low (CVSS 3.x base score 3.7)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-197
Affected product: Oisf Suricata
Published: 2026-09-18
Last modified: 2026-09-28

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.

Frequently asked questions

What is CVE-2026-63449?: 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.
How severe is CVE-2026-63449?: CVE-2026-63449 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-63449 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-63449?: CVE-2026-63449 affects Oisf Suricata. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-63449?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-63449 published?: CVE-2026-63449 was published on 2026-09-18 and last updated on 2026-09-28.

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-2026-94084 — Critical (CVSS 9.4): Suricata before 8.0.7 has an Http2ThreadMultiBuf use-after-free when a transaction is inspected by rules that use…
CVE-2026-94083 — Critical (CVSS 9.4): Suricata before 8.0.7 has a DoH2 type confusion that can cause an invalid free, because cleanup code for the HTTP2…
CVE-2026-45764 — Critical (CVSS 9.1): Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine.…

All CVEs affecting Oisf Suricata →

Other CWE-197 vulnerabilities

CVE-2024-43639 — Critical (CVSS 9.8): Windows KDC Proxy Remote Code Execution Vulnerability
CVE-2026-87529 — Critical (CVSS 9.6): Numeric truncation error in Media in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to potentially…
CVE-2020-15202 — Critical (CVSS 9.0): In Tensorflow before versions 1.15.4, 2.0.3, 2.1.2, 2.2.1 and 2.3.1, the `Shard` API in TensorFlow expects the last…
CVE-2024-49018 — High (CVSS 8.8): SQL Server Native Client Remote Code Execution Vulnerability
CVE-2024-43519 — High (CVSS 8.8): Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution Vulnerability
CVE-2024-30009 — High (CVSS 8.8): Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability

Browse all CWE-197 vulnerabilities →