CVE-2026-56331
Capgo - Improper Error Handling in Accept Invitation Endpoint via Invalid Magic String
Description
Capgo before 12.128.2 contains improper error handling in the /private/accept_invitation endpoint that returns HTTP 500 instead of safe 4xx errors when magic_invite_string is invalid. Attackers can trigger this vulnerability using only the public key by submitting malformed magic_invite_string values to cause server errors and leak internal processing details.
INFO
Published Date :
June 30, 2026, 10:08 p.m.
Last Modified :
June 30, 2026, 10:08 p.m.
Remotely Exploit :
Yes !
Source :
VulnCheck
Affected Products
The following products are affected by CVE-2026-56331
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 |
Solution
- Update Capgo to version 12.128.2 or later.
- Ensure the accept_invitation endpoint handles invalid input securely.
- Validate all input parameters before processing.
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CVE-2026-56331 vulnerability anywhere in the article.