CVE-2026-119661 (CVSS 4.2)

Description

ShowDoc through 3.9.5 contains an authorization bypass vulnerability in the api/paramDescLib/deleteEntries endpoint that checks edit permission only for the first supplied entry id. Authenticated attackers can place their own entry id first and append other users' entry ids to permanently delete those parameter-description entries.

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CVSS v3.1 Score

4.2

MEDIUM

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

EPSS — Exploit Prediction

0.0038

Probability of exploitation

0.32%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-639 CWE-639

References

Other References

https://github.com/star7th/showdoc https://github.com/star7th/showdoc/blob/v3.9.5/server/app/Api/Controller/ParamDescLibController.php#L545-L584 https://github.com/star7th/showdoc/commit/53228511e656904abf7841c3d25ff78a4b5ce9c2 https://github.com/star7th/showdoc/issues/2612 https://hackmd.io/@hieuPenguinnn/showdoc-paramdesclib-cross-item-idor-delete https://www.vulncheck.com/advisories/showdoc-through-3.9.5-authorization-bypass-via-paramdesclib-deleteentries

Frequently Asked Questions

What is CVE-2026-119661? +

ShowDoc through 3.9.5 contains an authorization bypass vulnerability in the api/paramDescLib/deleteEntries endpoint that checks edit permission only for the first supplied entry id. Authenticated attackers can place their own entry id first and append other users' entry ids to permanently delete those parameter-description entries. It has a CVSS v3.1 base score of 4.2 (MEDIUM).

How severe is CVE-2026-119661? +

CVE-2026-119661 has a CVSS v3.1 score of 4.2 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0038, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-119661? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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