CVE-2026-77619Network attack vectorHinoki check available

Unauthenticated service interruption via unbounded frame allocation

Published Sep 22, 2026 · Updated Sep 22, 2026

Memory exhaustion in Datadog Vector 0.15.0 through 0.56.x allows remote attackers to interrupt log ingestion via a crafted compressed frame. The logstash source reads a 32-bit frame length from the network and allocates a buffer of that declared size without enforcing an upper bound or receiving the claimed bytes. Exploitation requires network access to an enabled logstash listener; the resulting memory pressure aborts Vector or invokes the host OOM killer, halting shared-pipeline ingestion.

CVSS severity8.7
High
EPSS probability0.52%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Memory exhaustion in Datadog Vector 0.15.0 through 0.56.x allows remote attackers to interrupt log ingestion via a crafted compressed frame. The logstash source reads a 32-bit frame length from the network and allocates a buffer of that declared size without enforcing an upper bound or receiving the claimed bytes. Exploitation requires network access to an enabled logstash listener; the resulting memory pressure aborts Vector or invokes the host OOM killer, halting shared-pipeline ingestion.

The record

CVE
CVE-2026-77619
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Datadog
Product
Vector
Classifications
CWE-130, CWE-789, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.15.0, < 0.57.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Datadog · Vectorversion=>= 0.15.0, < 0.57.0

Published CVSS scores

8.7GitHub Security AdvisoryCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-130Improper Handling of Length Parameter Inconsistency
CWE-789Memory Allocation with Excessive Size Value
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started