VulnerabilityPublished 4 Nov 2026

CVE-2026-116648: Tanium addressed an improper output sanitization vulnerability in Discover

Source GCVE Database

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Authoritative record:CVE-2026-116648· Medium 4.1

Not known to be exploited · CVSS 4.1 Medium · fixed in 4.19.137 : update Discover when convenient.

Data as of 4 Nov 2026, 02:14 UTC

CVSS 3.1 base score

4.1Medium

How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none

CVSS scores by source
CNA (Tanium)	CVSS 3.1	4.1

Patch: Available – fixed in 4.19.137, 4.15.218, 4.10.204

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:L

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: Required
Scope: Changed
Confidentiality: None
Integrity: None
Availability: Low

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 3 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-w6q4-mj66-hrg4

What to do

Upgrade Discover to 4.19.137, 4.15.218 or 4.10.204.

Affected software

Product	Affected	Fixed in
TaniumDiscover	Affected >=4.19.0 <4.19.137	Fixed in 4.19.137
TaniumDiscover	Affected >=4.15.0 <4.15.218	Fixed in 4.15.218
TaniumDiscover	Affected >=4.10.0 <4.10.204	Fixed in 4.10.204

Description

CVE-2026-116648 is an improper output sanitization vulnerability in Tanium Discover. It has a medium severity with a CVSS score of 4.1. The flaw could lead to a partial impact on availability but does not affect confidentiality or integrity.

Impact

The vulnerability impacts availability with no confidentiality or integrity impact. An attacker could cause a denial of service or disruption of service in Tanium Discover. There is no indication of data disclosure or modification.

Summary

Tanium addressed a vulnerability identified as CVE-2026-116648 in its Discover product involving improper output sanitization. This vulnerability could potentially allow an attacker with low complexity and limited privileges to cause a denial of service or availability impact. The CVSS vector indicates network attack vector, low attack complexity, low privileges required, user interaction required, and scope changed. No further technical details or exploitation methods are provided.

CWE-1236Improper Neutralization of Formula Elements in a CSV File (opens in a new tab)
Base weakness
The product saves user-provided information into a Comma-Separated Value (CSV) file, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as a command when the file is opened by a spreadsheet product.
Implementation
When generating CSV output, ensure that formula-sensitive metacharacters are effectively escaped or removed from all data before storage in the resultant CSV. Risky characters include '=' (equal), '+' (plus), '-' (minus), and '@' (at).
Implementation
If a field starts with a formula character, prepend it with a ' (single apostrophe), which prevents Excel from executing the formula.
Architecture and Design
Certain implementations of spreadsheet software might disallow formulas from executing if the file is untrusted, or if the file is not authored by the current user.
OWASP Cheat Sheets
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
OWASP ASVS 4.0.3
V1.5.1 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 4 Nov 2026, 02:14 UTC

WeaknessesCWE-1236

Technical details

References

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