CVE-2026-18749: CVE-2026-18749

Deferred

Published 12-08-2026Last modified 13-08-2026

Vulnerability summary

CVE-2026-18749 is a critical (CVSS 9.8) vulnerability in cert/cc vince. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 42.7% of scored vulnerabilities.

Overall risk

70/100

0100

High · default modelHow is this calculated?

CVSS score

9.8/10

010

Critical · v3.1 (CVE.org)

EPSS score

0.51%

0%100%

Low · +0.16 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Timeline

12-08-2026
PublishedVulnerability first disclosed.
13-08-2026
Last modifiedVulnerability information updated.

Description

The type=track branch authorises on _is_my_case(t_attach.case) only and never checks VinceTrackAttachment.shared. A coordinator-uploaded case artefact that has NOT been marked shared is still retrievable by any case member who has (or is sent) its uuid — leaks not-yet-released coordinator material to vendors on the case.

CVSS metrics

2 scores · 2 sources · 1 version

v3.19.8

EPSS trend

Probability

0.51%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

Increase +0.16 pp

From 0.35% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-639Authorization Bypass Through User-Controlled KeyThe system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

Affected systems

Cert/cc1 product

vince< 3.0.44

1 vendor · 1 product

References

2 links