# CVE-2026-125372: REBUILD before 4.5.3 Authorization Bypass via Feeds Details and Comments Endpoints

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

REBUILD before 4.5.3 contains an authorization bypass vulnerability in FeedsListController fetchDetails and fetchComments that skips privilege filtering and FeedsHelper.checkReadable checks. Authenticated attackers can enumerate sequential IDs via the feeds-details and comments-list endpoints to read private or team-scoped feed content, images, attachments and comments.

## 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/getrebuild/rebuild/commit/03959a464164e12e87443c689043ceccf56044f3

## Affected products and versions

- getrebuild / rebuild: ≥ 0; < 4.5.3 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-639

## Exploit evidence

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

## References

- https://github.com/getrebuild/rebuild/issues/1139 (CNA: VulnCheck; issue-tracking)

- https://github.com/getrebuild/rebuild (CNA: VulnCheck; product)

- https://github.com/getrebuild/rebuild/blob/af00afcc22476b889c06c3db6032fd94a1454cfa/src/main/java/com/rebuild/web/feeds/FeedsListController.java#L190-L194 (CNA: VulnCheck; technical-description)

- https://github.com/getrebuild/rebuild/commit/03959a464164e12e87443c689043ceccf56044f3 (CNA: VulnCheck; patch)

- https://github.com/getrebuild/rebuild/releases/tag/4.5.3 (CNA: VulnCheck; release-notes)

- https://www.vulncheck.com/advisories/rebuild-before-4.5.3-authorization-bypass-via-feeds-details-and-comments-endpoints (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-125372; retrieved 2026-11-10; source updated 2026-11-09

Revision: 280a95df1f4f1689a26be4a55f3878fa6b7656a63164e9881294286a4c9f116d

Canonical: https://y2.dev/cve/CVE-2026-125372

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