What is CVE-2026-29839?

CVE-2026-29839 is a high-severity vulnerability in Dedecms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2026-03-24.

How severe is CVE-2026-29839?

High severity. CVSS v3 base score is 8.8 out of 10.

CSRF in Dedecms

CVE-2026-29839

DedeCMS v5.7.118 was discovered to contain a Cross-Site Request Forgery (CSRF) vulnerability in /sys_task_add.php.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2026-03-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (10.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 10.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001

Affected products

Dedecms — versions 5.7.118

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

www.dedecms.com/ (Product)
gist.github.com/w-p-man/43bfdf3c7cf889981d773d1276bb6a62 (Third Party Advisory)

Frequently asked questions

What is CVE-2026-29839?: CVE-2026-29839 is a high-severity vulnerability in Dedecms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2026-03-24.
How severe is CVE-2026-29839?: High severity. CVSS v3 base score is 8.8 out of 10.