OSV-2026-1026 Global-buffer-overflow in txt2sd
A global buffer overflow in the txt2sd function allows attackers to cause denial of service or potentially execute code via crafted mDNS packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2026-1026?
OSV-2026-1026 is a memory corruption vulnerability in open62541, published on 5 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=530698821
Crash type: Global-buffer-overflow READ 1
Crash state:
txt2sd
fuzz_mdns_xht.cc
Which versions are affected by OSV-2026-1026?
1 open source package ship an affected version, including open62541.
| Package | Affected | Fixed in |
|---|---|---|
open62541 OSS-Fuzz | All versions | None |
How do I fix OSV-2026-1026?
No fix has been published for OSV-2026-1026 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is OSV-2026-1026 being exploited?
There is no known exploitation of OSV-2026-1026 in the wild and no public exploit code.