CVE-2026-2303
CVE-2026-2303 is a medium-severity vulnerability with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-183.
Key facts
- Severity: Medium (CVSS 3.x base score 6.5)
- CVSS v4: 6.9
- EPSS exploit prediction: 0% (13th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-7065
- Weakness: CWE-183
- Published:
- Last modified:
Description
The mongo-go-driver repository contains CGo bindings for GSSAPI (Kerberos) authentication on Linux and macOS. The C wrapper implementation contains a heap out-of-bounds read vulnerability due to incorrect assumptions about string termination in the GSSAPI standard. Since GSSAPI buffers are not guaranteed to be null-terminated or have extra padding, this results in reading one byte past the allocated heap buffer.
Frequently asked questions
- What is CVE-2026-2303?
- The mongo-go-driver repository contains CGo bindings for GSSAPI (Kerberos) authentication on Linux and macOS. The C wrapper implementation contains a heap out-of-bounds read vulnerability due to incorrect assumptions about string termination in the GSSAPI standard. Since GSSAPI buffers are not guaranteed to be null-terminated or have extra padding, this results in reading one byte past the allocated heap buffer.
- How severe is CVE-2026-2303?
- CVE-2026-2303 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
- Is CVE-2026-2303 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-2303?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-2303 have an EU (EUVD) identifier?
- Yes. CVE-2026-2303 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7065.
- When was CVE-2026-2303 published?
- CVE-2026-2303 was published on 2026-02-10 and last updated on 2026-06-17.
References
Other CWE-183 vulnerabilities
- CVE-2026-3490 — Critical (CVSS 10.0): picklescan before 1.0.4 fails to block pkgutil.resolve_name, allowing attackers to bypass the entire blocklist by…
- CVE-2026-54316 — Critical (CVSS 9.1): Claude Code is an agentic coding tool. From 0.2.54 until 2.1.163, because the hostname huggingface.co was pre-approved…
- CVE-2026-29514 — High (CVSS 8.8): NetBox versions 4.3.5 through 4.5.4 contain a remote code execution vulnerability in the…
- CVE-2026-46391 — High (CVSS 8.7): HAX CMS helps manage microsite universe with PHP or NodeJs backends. Starting in version 9.0.1 and prior to version…
- CVE-2025-53762 — High (CVSS 8.7): Permissive list of allowed inputs in Microsoft Purview allows an authorized attacker to elevate privileges over a…
- CVE-2026-41387 — High (CVSS 7.8): OpenClaw before 2026.3.22 contains an incomplete host environment variable sanitization vulnerability in…