CVSS 4.0
8.7 highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NCVE-2026-123975 Grid Community Toolkit globus-gss-assist before 12.9 Pre-Authentication Heap Out-of-Bounds Write
High (8.7) in grid community forum.
Grid Community Toolkit before 6.2.20261111 (globus-gss-assist before 12.9) contains a heap out-of-bounds write in globus_gss_assist_token_get_fd() triggered by SSLv2 record lengths below 3. Remote unauthenticated clients can send a crafted GSI handshake record to services like globus-gatekeeper and myproxy to corrupt heap memory and crash the service.
Severity
CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- CWE
- CWE-787 Out-of-bounds Write
- Published
- Assigned by
- VulnCheck (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
Ask an AI about this CVE
Show the prompt
Explain CVE-2026-123975 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-123975?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-123975?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-123975 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
Badge for a README or a site
An image that stays current: it is drawn from the data each time it is fetched (a host that proxies images, as GitHub does, may show its copy for a while). Markdown:
[](https://cve.bz/cve/CVE-2026-123975)
HTML:
<a href="https://cve.bz/cve/CVE-2026-123975"><img src="https://cve.bz/cve/badge/CVE-2026-123975.svg" alt="CVE-2026-123975"></a>
Affected
- grid community forum:globus-gss-assist
- grid community forum:grid community toolkit
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Grid Community Forum Grid Community Toolkit | before 6.2.20261111 |
| Grid Community Forum globus-gss-assist | before 12.9 |
References
- https://github.com/gridcf/gct/blob/v6.2.20190829/gsi/gss_assist/source/tokens_f.c
- https://github.com/gridcf/gct/commit/3df2be4834c146bdcec90009a0f2e5771ff63cca
- https://github.com/gridcf/gct/releases/tag/v6.2.20261111
- https://gridcf.org/#2026-11-11
- https://www.vulncheck.com/advisories/grid-community-toolkit-globus-gss-assist-before-12.9-pre-authentication-heap-out-of-bounds-write