CVE-2026-28677: high-severity vulnerability in OpenSift
OpenSift: Insufficient URL destination restrictions in ingest flow could enable SSRF-style internal access
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.3%
OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. Prior to version 1.6.3-alpha, the URL ingest pipeline accepted user-controlled remote URLs with incomplete destination restrictions. Although private/local host checks existed, missing restrictions for credentialed URLs, non-standard ports, and cross-host redirects left SSRF-class abuse paths in non-localhost deployments. This issue has been patched in version 1.6.3-alpha.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
Affected products
OpenSift · OpenSiftRelated CVEs — OpenSift
In the same product, most dangerous first.
CVE-2026-28676HIGHOpenSift: Insufficient path containment checks in storage helpers could allow path traversal-style file operationsEPSS 0.5%CVE-2026-27169HIGHOpenSift: Persistent XSS Chat Tool RenderingEPSS 0.4%CVE-2026-28675MEDIUMOpenSift: Sensitive implementation details exposed via raw exception messages and token-returning endpointsEPSS 0.3%CVE-2026-27170HIGHOpenSift: SSRF risk in URL ingestion endpointEPSS 0.2%CVE-2026-27189MEDIUMOpenSift: Race-prone local persistence could cause state corruption/lossEPSS 0.1%
References
https://github.com/OpenSift/OpenSift/commit/1126e0a503876056a68a434e19f64158a5a4840bhttps://github.com/OpenSift/OpenSift/commit/de99b9chttps://github.com/OpenSift/OpenSift/pull/67https://github.com/OpenSift/OpenSift/releases/tag/v1.6.3-alphahttps://github.com/OpenSift/OpenSift/security/advisories/GHSA-5jfc-p787-2mf9