How severe is CVE-2026-9156?

CVE-2026-9156 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-9156 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-9156?

CVE-2026-9156 affects Tanium Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-9156?

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

Does CVE-2026-9156 have an EU (EUVD) identifier?

Yes. CVE-2026-9156 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32034.

When was CVE-2026-9156 published?

CVE-2026-9156 was published on 2026-05-27 and last updated on 2026-06-17.

CVE-2026-9156

CVE-2026-9156 is a medium-severity vulnerability in Tanium Server with a CVSS 3.x base score of 6.5. 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-772.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-32034
Weakness: CWE-772
Affected product: Tanium Server
Published: 2026-05-27
Last modified: 2026-06-17

Description

Tanium addressed a denial of service vulnerability in Tanium Server.

Frequently asked questions

What is CVE-2026-9156?: Tanium addressed a denial of service vulnerability in Tanium Server.
How severe is CVE-2026-9156?: CVE-2026-9156 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-9156 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-9156?: CVE-2026-9156 affects Tanium Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-9156?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-9156 have an EU (EUVD) identifier?: Yes. CVE-2026-9156 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32034.
When was CVE-2026-9156 published?: CVE-2026-9156 was published on 2026-05-27 and last updated on 2026-06-17.

References

https://security.tanium.com/TAN-2026-013

Affected products (1)

cpe:2.3:a:tanium:server:*:*:*:*:*:*:*:*

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CVE-2017-14138 — Critical (CVSS 9.8): ImageMagick 7.0.6-5 has a memory leak vulnerability in ReadWEBPImage in coders/webp.c because memory is not freed in…
CVE-2017-11641 — Critical (CVSS 9.8): GraphicsMagick 1.3.26 has a Memory Leak in the PersistCache function in magick/pixel_cache.c during writing of Magick…
CVE-2020-14339 — High (CVSS 8.8): A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. This…
CVE-2018-19760 — High (CVSS 8.8): cfg_init in confuse.c in libConfuse 3.2.2 has a memory leak.

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