CVE-2026-112063: Stack-based Buffer Overflow in strophe libstrophe
Description
libstrophe versions up to 0.14.0 have a stack-based buffer overflow vulnerability in the SCRAM_Hi function. This occurs when a malicious XMPP server sends a server-first-message with an s= attribute that decodes to more than 124 bytes, overflowing a 128-byte stack buffer. This can cause the client to abort or overwrite stack memory in NDEBUG builds. The vulnerability has a CVSS 4.0 score of 6.0, indicating medium severity.
CVSS v4.0
Score 6.0medium
Affected software
strophe
libstrophe
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-112063 is a stack-based buffer overflow vulnerability in libstrophe through version 0.14.0. The flaw exists in the SCRAM_Hi function, where the client processes the server-first-message during SCRAM authentication. If the s= attribute (SCRAM salt) decodes to more than 124 bytes, it overflows a 128-byte stack buffer, potentially causing client crashes or stack memory corruption in builds compiled with NDEBUG. The vulnerability requires interaction with a malicious XMPP server and user interaction (UI:P).
Potential Impact
An attacker controlling an XMPP server can send a specially crafted server-first-message with an oversized SCRAM salt to trigger a stack-based buffer overflow in the client. This can cause the client application to abort or overwrite stack memory, potentially leading to denial of service or undefined behavior. There is no indication of remote code execution or privilege escalation from the provided data.
Mitigation Recommendations
No vendor advisory or patch information is provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid connecting libstrophe clients to untrusted XMPP servers or those that could send malicious SCRAM salts.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-18T12:00:08.233Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad4bcc32cdf04f656692494
Added to database: 10/18/2026, 12:34:11 UTC
Last enriched: 10/18/2026, 12:48:17 UTC
Last updated: 10/18/2026, 20:11:59 UTC
Views: 9
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.