CVE-2026-123975 json
Grid Community Toolkit globus-gss-assist before 12.9 Pre-Authentication Heap Out-of-Bounds Write
published yesterday modified yesterday also EUVD-2026-125403
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 29%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Grid Community Forum Grid Community Toolkit 6.2.20261111
- Grid Community Forum globus-gss-assist 12.9
Is CVE-2026-123975 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.35% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-14).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- Grid Community Forum Grid Community Toolkit
- Grid Community Forum globus-gss-assist
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
github.com
/gridcf/gct/commit/3df2be4834c146bdcec90009a0f2e5771ff63cca
patch
-
gridcf.org
/#2026-11-11
vendor-advisory
-
github.com
/gridcf/gct/releases/tag/v6.2.20261111
release-notes
-
github.com
/gridcf/gct/blob/v6.2.20190829/gsi/gss_assist/source/tokens_f.c
technical-description
-
vulncheck.com
/advisories/grid-community-toolkit-globus-gss-assist-before-12.9-pre-authentication-heap-out-of-bounds-write
third-party-advisory
Sources
- CVE List CVE-2026-123975
- NVD CVE-2026-123975
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.