HSEC-2026-0006 json
Cabal deletes project source files during configure
published 7mo ago modified 7mo ago
- cvss
- 5.5
- version 3.1, OSV
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- —
- no score, EPSS covers CVEs only
- public exploits
- 0
- none known
Summary
# Cabal deletes project source files during configure
The `checkDuplicateHeaders` function in `Distribution.Simple.Configure` removes header files from the source directory when a header with the same name exists in both the build directory and the source directory.
This behavior was introduced in commit `3a9830b` to resolve header precedence issues, as C compilers prefer relative includes over `-I` search paths. The workaround uses `removeFile` on source directory files, which is destructive and should not happen during a build process.
While the current implementation does not follow symlinks explicitly, the deletion of source files outside of the project during a build operation is possible on Microsoft Windows.
Patch / fix
Is HSEC-2026-0006 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| OSV | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| hackage | Cabal | >=2.2 |
no fix listed |
References
Sources
- OSV HSEC-2026-0006
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.