# CVE-2026-129156: DjangoBlog commit d186b1c through 6134ed6 Stored XSS via Comment Reactions

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

DjangoBlog commit d186b1c through commit 6134ed6 contains a stored cross-site scripting vulnerability that allows authenticated OAuth users to inject script via an unescaped nickname in comment reactions. Attackers can set their OAuth display name to a payload closing the single-quoted data-reactions attribute, then react to a comment to execute script in article visitors' browsers.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- liangliangyy / DjangoBlog (liangliangyy/DjangoBlog): ≥ d186b1c53bac400a0c8a840f62a121d59880fe97; ≤ 6134ed63079de676b271af31de4dd40264d17c52 (affected, git). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 5.1 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N; source: CNA: VulnCheck

- CVSS 4.0: 5.1 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-79

## Exploit evidence

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

## References

- https://vul.yulun.ac.cn/20261101/djangoblog/ (CNA: VulnCheck; third-party-advisory)

- https://github.com/liangliangyy/DjangoBlog/issues/1030 (CNA: VulnCheck; issue-tracking)

- https://github.com/liangliangyy/DjangoBlog/blob/6134ed63079de676b271af31de4dd40264d17c52/oauth/views.py#L102-L112 (CNA: VulnCheck; technical-description)

- https://github.com/liangliangyy/DjangoBlog/blob/6134ed63079de676b271af31de4dd40264d17c52/templates/comments/tags/comment_item_modern.html#L76 (CNA: VulnCheck; technical-description)

- https://github.com/liangliangyy/DjangoBlog/blob/6134ed63079de676b271af31de4dd40264d17c52/blog/templatetags/blog_tags.py#L162-L164 (CNA: VulnCheck; technical-description)

- https://www.vulncheck.com/advisories/djangoblog-commit-d186b1c-through-6134ed6-stored-xss-via-comment-reactions (CNA: VulnCheck; third-party-advisory)

- https://github.com/liangliangyy/DjangoBlog/blob/6134ed63079de676b271af31de4dd40264d17c52/blog/templatetags/blog_tags.py#L162-L164 (disclosure@vulncheck.com)

- https://github.com/liangliangyy/DjangoBlog/blob/6134ed63079de676b271af31de4dd40264d17c52/oauth/views.py#L102-L112 (disclosure@vulncheck.com)

- https://github.com/liangliangyy/DjangoBlog/blob/6134ed63079de676b271af31de4dd40264d17c52/templates/comments/tags/comment_item_modern.html#L76 (disclosure@vulncheck.com)

- https://github.com/liangliangyy/DjangoBlog/issues/1030 (disclosure@vulncheck.com)

- https://vul.yulun.ac.cn/20261101/djangoblog/ (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/djangoblog-commit-d186b1c-through-6134ed6-stored-xss-via-comment-reactions (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-129156; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-129156; retrieved 2026-11-14; source updated 2026-11-13

Revision: 4e5d9bf3c887382dff0116545886730709e81511ec6fe17b9296defdd49d2e43

Canonical: https://y2.dev/cve/CVE-2026-129156

## 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.