CVE-2026-112063 libstrophe through 0.14.0 Stack-Based Buffer Overflow via SCRAM Salt in SCRAM_Hi
A malicious XMPP server can trigger a stack-based buffer overflow in libstrophe by sending an oversized SCRAM salt, potentially causing code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-112063?
CVE-2026-112063 is a medium-severity memory corruption vulnerability in libstrophe, published on 18 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
libstrophe through 0.14.0 contains a stack-based buffer overflow vulnerability in SCRAM_Hi that allows malicious XMPP servers to overflow a 128-byte stack buffer by sending an oversized SCRAM salt. Attackers can send a server-first-message whose s= attribute decodes to more than 124 bytes, aborting the client or overwriting stack memory in NDEBUG builds.
Weakness: CWE-121
Which versions are affected by CVE-2026-112063?
How do I fix CVE-2026-112063?
No fix has been published for CVE-2026-112063 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 CVE-2026-112063 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-112063 exists.
Sources
Also known as DEBIAN-CVE-2026-112063, GHSA-37wj-432m-6r6f, UBUNTU-CVE-2026-112063.