CVE-2026-29078Disclosure(lexbor / lexbor)

LOWCVSS 7.5 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

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.

lexbor CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://github.com/lexbor/lexbor/security/advisories/GHSA-mrwr-xh7f-96v3

Weakness type (CWE)

CWE-191CWE-787

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

lexbor

Threat summary

2 mentions across 1 observed day

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
2 total mentions across 1 day

Affected systems

Vendors

lexbor

Products

lexbor

Deep dive

Activity timeline2 mentions / 1d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Infoflowcloud@infoflowcloud211d
Disclosure
🚨*CVE* CVE-2026-29078 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… https://www.cve.org/CVERecord?id=CVE-2026-29078 ----- Traducción: CVE-2026-29078 Lex… http://infoflow.cloud`
Post summary
The tweet announces CVE‑2026‑29078, describing a reset failure in Lexbor’s ISO‑2022‑JP encoder before version 2.7.0. No exploitation or patch information is provided.
0000039
57 followersView on X
CVE@CVEnew211d
Disclosure
CVE-2026-29078 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… https://www.cve.org/CVERecord?id=CVE-2026-29078
Post summary
The text reports a flaw in Lexbor’s ISO‑2022‑JP encoder, but lacks any PoC, exploit, or patch details, making it a straightforward vulnerability disclosure.
00000388
56.7K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	lexbor	lexbor	-	-	-

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