CVE-2026-61674

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.72% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 53.6% of scored records. A rank, not a probability.

NVD base score

9.2 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-09-24.

Red Hat severity

Critical. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-21 16:10Z1 MO AGO

Last updated

2026-09-21 18:52Z1 MO AGO

Reserved

2026-07-10

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Critical (CVSS 9.2)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-121Stack-based Buffer OverflowVariant
• CWE-787Out-of-bounds WriteBase
• CWE-843Access of Resource Using Incompatible Type ('Type Confusion')Base
• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base

Data version

5.2

Document digest

5006d400163fac078110df5d74b777c22e6d3b7d1c497cab11f0661200712edf

• github.comhttps://github.com/fluent/fluent-bit/security/advisories/GHSA-jrp8-r9hx-gf73x_refsource_CONFIRM
• github.comhttps://github.com/fluent/fluent-bit/pull/11945x_refsource_MISC
• github.comhttps://github.com/fluent/fluent-bit/commit/45486556be9d023e194665e243f156b228e195e0x_refsource_MISC
• github.comhttps://github.com/fluent/fluent-bit/releases/tag/v5.0.8x_refsource_MISC