# CVE-2026-116827: YesWiki server-side request forgery in Bazar CSV import

Source: https://junglewise.ai/threats/cve-2026-116827-yeswiki-before-4-7-0-contains-a-server-side-request-forgery  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-116827 · Severity: medium · CVSS 6.8 · Published 2026-10-27

YesWiki is a wiki platform that allows administrators to import data from CSV files into content databases called Bazars. The Bazar CSV import function downloads files specified in those CSV files without properly validating their destinations. An authenticated administrator can exploit this to trick the server into connecting to internal services, cloud credential endpoints, or local files, with responses stored in a publicly accessible directory.

Technologies: [YesWiki](https://junglewise.ai/threats/technologies/yeswiki). Vendors: [YesWiki](https://junglewise.ai/threats/vendors/yeswiki).

## Quick answers

**Is CVE-2026-116827 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116827 being exploited in the wild.

**How severe is CVE-2026-116827?** Medium severity, with a CVSS score of 6.8, published 27 October 2026.

**Which products and versions are affected?** YesWiki before 4.7.0.

**Is there a fix for CVE-2026-116827?** Yes: fixed in 4.7.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-116827 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-116827?** Check whether you run YesWiki at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 4.7.0

## Technical details

The copyUrlToLocalFile() function in the Bazar CSV import action passes attacker-controlled URLs directly to curl without SSRF protection, protocol filtering, or hostname validation. Authenticated administrators can inject URLs targeting file://, gopher://, or dict:// schemes, exploit query-string bypasses of extension checks, or chain redirects to exfiltrate cloud metadata credentials and internal service responses to the web-accessible files/ directory.

## Affected products

- YesWiki YesWiki before 4.7.0

## Timeline

- 2026-10-12: disclosed: GitHub security advisory published
- 2026-10-27: advisory: NVD entry published

## References

- [https://github.com/YesWiki/yeswiki/security/advisories/GHSA-v38g-qc7g-q3mq](https://github.com/YesWiki/yeswiki/security/advisories/GHSA-v38g-qc7g-q3mq)
- [https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-ssrf-via-copyurltolocalfile-in-bazar-csv-import](https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-ssrf-via-copyurltolocalfile-in-bazar-csv-import)

## Related threats

- [YesWiki SQL injection in despam.php INTERVAL operand](https://junglewise.ai/threats/cve-2026-116828-yeswiki-before-4-7-0-contains-a-sql-injection-vulnerability-in)
- [YesWiki server-side request forgery in DuplicationManager](https://junglewise.ai/threats/cve-2026-116826-yeswiki-before-4-7-0-contains-a-server-side-request-forgery)
- [YesWiki HTTP Signature replay protection missing in ActivityPub inbox](https://junglewise.ai/threats/cve-2026-116825-yeswiki-from-4-6-2-before-4-7-0-lacks-replay-protection-in)
- [YesWiki stored cross-site scripting in referrers_sites handler](https://junglewise.ai/threats/cve-2026-116824-yeswiki-before-4-7-0-contains-a-stored-cross-site-scripting)
- [YesWiki reflected cross-site scripting in Bazar field rendering](https://junglewise.ai/threats/cve-2026-116823-yeswiki-before-4-7-0-contains-a-reflected-cross-site-scripting)