# CVE-2026-123676: xxyopen/201206030 novel Book Content Service BookServiceImpl.java BookServiceImpl.getBookContentAbout improper authorization

Status: published. Published: 2026-11-06. Updated: 2026-11-11.

A vulnerability has been found in xxyopen/201206030 novel up to 3.5.0. This impacts the function BookServiceImpl.getBookContentAbout of the file src/main/java/io/github/xxyopen/novel/service/impl/BookServiceImpl.java of the component Book Content Service. Such manipulation of the argument chapterId leads to improper authorization. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 966c4bdde3521dc0a165d15a2acff66ee33eaaa7. Applying a patch is advised to resolve this issue.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/201206030/novel/pull/52
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/201206030/novel/commit/966c4bdde3521dc0a165d15a2acff66ee33eaaa7

## Affected products and versions

- xxyopen / novel: 3.0 (affected); 3.1 (affected); 3.2 (affected); 3.3 (affected); 3.4 (affected); 3.5.0 (affected). Source: CNA: VulDB
- 201206030 / novel: 3.0 (affected); 3.1 (affected); 3.2 (affected); 3.3 (affected); 3.4 (affected); 3.5.0 (affected). Source: CNA: VulDB

## 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/E:P; source: CNA: VulDB

- 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/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 3.0: 5.3 (medium); CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 2.0: 5 (medium); AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:OF/RC:C; source: CNA: VulDB

- CVSS 4.0: 5.5 (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:P/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: cna@vuldb.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: cna@vuldb.com

- CVSS 2.0: 5 (medium); AV:N/AC:L/Au:N/C:P/I:N/A:N; source: NVD: cna@vuldb.com

- CISA KEV: No listing in collected sources

- EPSS: 0.31% as of 2026-11-10; percentile 24.24%

- SSVC: exploitation poc; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-285, CWE-266

## Exploit evidence

- exploit: https://github.com/201206030/novel/pull/52 (CNA: VulDB)

## References

- https://vuldb.com/vuln/431793 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/431793/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-123676 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1033603 (CNA: VulDB; third-party-advisory)

- https://github.com/201206030/novel/pull/52 (CNA: VulDB; exploit, issue-tracking, patch)

- https://github.com/201206030/novel/commit/966c4bdde3521dc0a165d15a2acff66ee33eaaa7 (CNA: VulDB; patch)

- https://github.com/201206030/novel/commit/966c4bdde3521dc0a165d15a2acff66ee33eaaa7 (cna@vuldb.com)

- https://github.com/201206030/novel/pull/52 (cna@vuldb.com)

- https://vuldb.com/cve/CVE-2026-123676 (cna@vuldb.com)

- https://vuldb.com/submit/1033603 (cna@vuldb.com)

- https://vuldb.com/vuln/431793 (cna@vuldb.com)

- https://vuldb.com/vuln/431793/cti (cna@vuldb.com)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-123676; retrieved 2026-11-11; source updated 2026-11-11

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-123676; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-123676; retrieved 2026-11-11; source updated Not reported

Revision: 7d4519274669d88e2a6df425b88ba1b5c88931880870d28b23023d34a2d67d64

Canonical: https://y2.dev/cve/CVE-2026-123676

## 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.