Vulnerability · Published Aug 11, 2026 · Assigned by GitHub_M

CVE-2026-73243kkFileView: Unauthenticated SSRF via /addTask with fullfilename type-confusion bypass

Medium 5.8

In plain English

A medium-severity server-side request forgery in kkFileView from kekingcn. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).

Severity (CVSS 3.1)5.8Medium

Exploit odds (30 days)0.4%top 62.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

kkFileView is a universal file online preview project based on Spring Boot. Prior to 5.0.1, the unauthenticated GET /addTask endpoint in kkFileView is omitted from TrustHostFilter and TrustDirFilter in server/src/main/java/cn/keking/config/WebConfig.java, allowing FileConvertQueueTask to fetch an attacker-selected URL after FileHandlerService#getFileAttribute uses the fullfilename parameter to force an OFFICE, COMPRESS, or CAD type. This issue is fixed in version 5.0.1.

Affected products (as reported)

Vendor	Product	Versions
kekingcn	kkFileView	< 5.0.1

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

References

https://github.com/kekingcn/kkFileView/security/advisories/GHSA-gwwj-52hv-6g2m x_refsource_CONFIRM
https://github.com/kekingcn/kkFileView/issues/765 x_refsource_MISC
https://github.com/kekingcn/kkFileView/pull/767 x_refsource_MISC
https://github.com/kekingcn/kkFileView/commit/32a887aa2cd70228998c617c4e7df6cfcf3fe709 x_refsource_MISC
https://github.com/kekingcn/kkFileView/releases/tag/v5.0.1 x_refsource_MISC