CVE-2026-27890
High · 8.2CVSS
8.2
EPSS
0.7%
Published
Apr 17, 2026
CISA due date
—
The record
Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when processing CNCT_specific_data segments during authentication, the server assumes segments arrive in strictly ascending order. If segments arrive out of order, the Array class's grow() method computes a negative size value, causing a SIGSEGV crash. An unauthenticated attacker who knows only the server's IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
Related vulnerabilities
- CVE-2026-112108 A vulnerability was determined in ztxz16 fastllm up to 0.1.8.2. CWE-119
- CVE-2026-112073 A vulnerability was identified in Tencent ncnn up to 44b02dabdcf97499281a4692ebd65bad73dc… CWE-119
- CVE-2026-90831 A vulnerability was detected in GNU Binutils 2.47. CWE-119
- CVE-2026-90804 A vulnerability was detected in GNU Binutils 2.47. CWE-119
- CVE-2026-90803 A security vulnerability has been detected in GNU Binutils 2.47. CWE-119
- CVE-2026-90801 A security flaw has been discovered in GNU Binutils 2.47. CWE-119
- CVE-2026-87933 A vulnerability was found in DaveGamble cJSON up to 1.7.19. CWE-119
- CVE-2026-87931 A vulnerability has been found in Behavioral Technology Group Pavlok Behavioral… CWE-119