# CVE-2026-117562: rssant 1.9.0 through 1.9.1 Information Disclosure via publish.story_get Endpoint

Status: published. Published: 2026-10-27. Updated: 2026-11-02.

rssant 1.9.0 through 1.9.1 contains an authorization bypass vulnerability that allows unauthenticated attackers to read stories from unpublished feeds through the anonymous publish.story_get endpoint. Because UnionStory.get_by_feed_offset ignores the only_publish flag, attackers can enumerate feed IDs and offsets to retrieve private feed stories.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/anyant/rssant/commit/b65336f1414a32a50670ee2ba7e87cb38e0ad47b

## Affected products and versions

- anyant / rssant: ≥ 1.9.0; ≤ 1.9.1 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N; source: CNA: VulnCheck

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: 0.32% as of 2026-11-02; percentile 25.28%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-639

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/anyant/rssant/issues/155 (CNA: VulnCheck; issue-tracking)

- https://github.com/anyant/rssant (CNA: VulnCheck; product)

- https://github.com/anyant/rssant/commit/b65336f1414a32a50670ee2ba7e87cb38e0ad47b (CNA: VulnCheck; patch)

- https://github.com/anyant/rssant/blob/v1.9.1/rssant_api/models/union_story.py#L197-L200 (CNA: VulnCheck; technical-description)

- https://www.vulncheck.com/advisories/rssant-1.9.0-through-1.9.1-information-disclosure-via-publish-story-get-endpoint (CNA: VulnCheck; third-party-advisory)

- https://github.com/anyant/rssant (disclosure@vulncheck.com)

- https://github.com/anyant/rssant/blob/v1.9.1/rssant_api/models/union_story.py#L197-L200 (disclosure@vulncheck.com)

- https://github.com/anyant/rssant/commit/b65336f1414a32a50670ee2ba7e87cb38e0ad47b (disclosure@vulncheck.com)

- https://github.com/anyant/rssant/issues/155 (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/rssant-1.9.0-through-1.9.1-information-disclosure-via-publish-story-get-endpoint (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-117562; retrieved 2026-11-02; source updated 2026-11-02

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-117562; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-117562; retrieved 2026-11-02; source updated Not reported

Revision: bbd7c78422c7c73139d0c9d80f3343499aa224f743de59e9b3e62dd585efe9a6

Canonical: https://y2.dev/cve/CVE-2026-117562

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.