VDB
CVE-2026-29078
CVE-2026-29078
PUBLISHED
CVSS 8.199999809265137 HIGH
Lexbor is a web browser engine library. Prior to 2.7.0, the ISO‑2022‑JP encoder in Lexbor fails to reset the temporary size variable between iterations. The statement ctx->buffer_used -= size with a stale size = 3 causes an integer underflow that wraps to SIZE_MAX. Afterwards, memcpy is called with a negative length, leading to an out‑of‑bounds read from the stack and an out‑of‑bounds write to the heap. The source data is partially controllable via the contents of the DOM tree. This vulnerability is fixed in 2.7.0.
EPSS 0.06% · 19.8th percentile
Risk Scores
CVSS v4.0
8.199999809265137
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS Score
0.06%
19.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| lexbor | lexbor | < 2.7.0, 0, < 2.7.0 |
Timeline
- Mar 13, 2026 CVE Published
- Mar 14, 2026 EPSS Score
- Mar 15, 2026 EPSS Score
- Mar 16, 2026 EPSS Score
- Mar 16, 2026 CVE Updated
- Mar 17, 2026 EPSS Score
- Mar 17, 2026 Coalition ESS Score
- Mar 18, 2026 EPSS Score
- Mar 19, 2026 EPSS Score
- Mar 20, 2026 EPSS Score
- Mar 21, 2026 EPSS Score
- Mar 22, 2026 EPSS Score