CVE-2026-112063

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.

CVSS 4.0

6.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H

EPSS

0.3% chance of exploitation in the next 30 days; higher than 20% of CVEs (scores of 2026-10-25)

CWE

CWE-121

Published

2026-10-18

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

References

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

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