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CVE-2026-26833

30
FAUCET Score

CVE-2026-26833 identifies a critical OS command injection vulnerability in mmahrous thumbler versions up to 1.1.2. This flaw allows an unauthenticated attacker to execute arbitrary commands on the underlying system by injecting malicious input into parameters of the thumbnail() function, which are unsafely processed in a shell command. With a CVSS score of 9.8 (Critical), the vulnerability has a network-based attack vector and low complexity, enabling full compromise of confidentiality, integrity, and availability. Despite its severe impact, there is currently no evidence of active exploitation, public exploit code, or significant community discussion or media coverage regarding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.1.2CPE matchmatch criteria
cpe:2.3:a:mmahrous:thumbler:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.31%
Probability of exploitation in next 30 days
EPSS Percentile
81.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0231 is in the 71st percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

npmGHSA-mvhf-547c-h55rcritical

thumbler allows OS Command Injection

Mar 25, 2026

References

github.com / mmahrous/thumbler
Product
github.com / mmahrous/thumbler/blob/master/lib/thumbler.js
Not Applicable
github.com / zebbernCVE/CVE-2026-26833
ExploitVendor Advisory
npmjs.com / package/thumbler
Product