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VulnerabilityPublished

CVE-2026-100626: Cap-go capgo.app · Insecure Direct Object Reference

Affects Cap-go capgo.appSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium.

Data as of 10 Nov 2026, 23:24 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 10 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Cap-gocapgo.appAffected
  • <=12.128.2
Fixed in–
GitHubcap-go/capgo.apppkg:github/cap-go/capgo.appOther threatsAffected
  • <=12.128.2
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until an official fix is available, restrict access to the PUT /app/:appId endpoint and monitor usage for suspicious activity. Avoid sharing service-role-signed URLs and consider implementing stricter validation on user-supplied paths to prevent unauthorized access.

Description

CVE-2026-100626 is an authorization bypass vulnerability in capgo.app versions up to 12.128.2. It affects the PUT /app/:appId endpoint, allowing authenticated users to supply arbitrary icon storage paths in a private images bucket. This enables them to obtain service-role-signed URLs valid for 7 days, which can be used to read cross-tenant objects such as user avatars, organization logos, and app icons without proper authorization.

References

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