CVE-2026-54610
LibreDWG is a free C library to read and write DWG files. Prior to 0.14, `bit_TV_to_utf8()` in `src/bits.c` can write to the caller-provided
CVSS
3.3
Low
EPSS
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KEV
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Exploit Today
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0-100
Published: Oct 30, 2026 · Last modified: Oct 30, 2026 · CWE-471 · CWE-703
Not enough EPSS history yet.
LibreDWG is a free C library to read and write DWG files. Prior to 0.14, `bit_TV_to_utf8()` in `src/bits.c` can write to the caller-provided `src` buffer despite accepting const input. On an `iconv()` error other than `E2BIG`, the function frees its output buffer and passes the original input alias to `bit_u_expand()`, which expands or shrinks Unicode and multibyte escape sequences in place. If the input is a string literal, read-only mapping, or other immutable buffer, the write can cause a segmentation fault and denial of service; mutable caller-owned input can be unexpectedly modified before being returned. This affects applications that expose the conversion API to untrusted input under those conditions. Direct file-triggered exploitability through normal DWG decode/export paths remains unconfirmed because many TV strings are heap allocated by bit_read_TV(). This issue is fixed in version 0.14.
- github.comhttps://github.com/LibreDWG/libredwg/commit/08c034a224a4e9512b1cd62e74b5cf081a4cfa89
- github.comhttps://github.com/LibreDWG/libredwg/releases/tag/0.14
- github.comhttps://github.com/LibreDWG/libredwg/security/advisories/GHSA-5p98-8245-6hxq
- github.comhttps://github.com/user-attachments/files/28631091/libredwg-bit-tv-to-utf8-submission.tar.gz
CVECVSSEPSSKEVRExploitTitleMod.
CVE-2026-634025.9 MED—
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