How severe is CVE-2024-26455?

CVE-2024-26455 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-26455 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-26455?

CVE-2024-26455 affects Treasuredata Fluent Bit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-26455?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-26455 have an EU (EUVD) identifier?

Yes. CVE-2024-26455 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-23724.

When was CVE-2024-26455 published?

CVE-2024-26455 was published on 2024-02-26 and last updated on 2026-06-17.

CVE-2024-26455

CVE-2024-26455 is a high-severity vulnerability in Treasuredata Fluent Bit with a CVSS 3.x base score of 7.5. 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-416.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-23724
Weakness: CWE-416
Affected product: Treasuredata Fluent Bit
Published: 2024-02-26
Last modified: 2026-06-17

Description

fluent-bit 2.2.2 contains a Use-After-Free vulnerability in /fluent-bit/plugins/custom_calyptia/calyptia.c.

Frequently asked questions

What is CVE-2024-26455?: fluent-bit 2.2.2 contains a Use-After-Free vulnerability in /fluent-bit/plugins/custom_calyptia/calyptia.c.
How severe is CVE-2024-26455?: CVE-2024-26455 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-26455 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-26455?: CVE-2024-26455 affects Treasuredata Fluent Bit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-26455?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-26455 have an EU (EUVD) identifier?: Yes. CVE-2024-26455 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-23724.
When was CVE-2024-26455 published?: CVE-2024-26455 was published on 2024-02-26 and last updated on 2026-06-17.

References

https://github.com/LuMingYinDetect/fluent-bit_defects/blob/main/fluent-bit_detect_1.md

Affected products (1)

cpe:2.3:a:treasuredata:fluent_bit:2.2.2:*:*:*:*:*:*:*

More vulnerabilities in Treasuredata Fluent Bit

CVE-2024-4323 — Critical (CVSS 9.8): A memory corruption vulnerability in Fluent Bit versions 2.0.7 thru 3.0.3. This issue lies in the embedded http…
CVE-2021-36088 — Critical (CVSS 9.8): Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flb_free (called from flb_parser_json_do and…
CVE-2025-12977 — Critical (CVSS 9.1): Fluent Bit in_http, in_splunk, and in_elasticsearch input plugins fail to sanitize tag_key inputs. An attacker with…
CVE-2025-12970 — High (CVSS 8.8): The extract_name function in Fluent Bit in_docker input plugin copies container names into a fixed size stack buffer…
CVE-2021-46879 — High (CVSS 7.8): An issue was discovered in Treasure Data Fluent Bit 1.7.1, a wrong variable is used to get the msgpack data resulting…
CVE-2021-46878 — High (CVSS 7.8): An issue was discovered in Treasure Data Fluent Bit 1.7.1, erroneous parsing in flb_pack_msgpack_to_json_format leads…

All CVEs affecting Treasuredata Fluent Bit →

Other CWE-416 (Use After Free) vulnerabilities

CVE-2026-13782 — Critical (CVSS 10.0): Use after free in Browser in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the…
CVE-2026-4725 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149…
CVE-2026-4688 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox…
CVE-2025-24085 — Critical (CVSS 10.0): A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.3 and iPadOS 18.3,…
CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…
CVE-2021-32495 — Critical (CVSS 10.0): Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory…

Browse all CWE-416 (Use After Free) vulnerabilities →