CVE-2026-58107
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk22th percentile - higher than 22% of all known CVEs
Summary
CodeChecker's massStoreRun processing path performs one-shot decompression of attacker-controlled, Base64-encoded zlib data without enforcing a maximum decompressed size. An authenticated user with permission to store analysis runs can submit a highly compressed payload that expands to a significantly larger byte sequence. Because the entire decompressed output is materialized in memory before being written to a temporary file, a sufficiently large payload may exhaust process or host memory and consume substantial disk space, resulting in denial of service.
Risk Assessment
The attack can lead to exhaustion of system resources, resulting in unavailability of the CodeChecker service for other users.
Recommendation
Update CodeChecker to a version that limits the maximum decompressed size. If possible, restrict permissions to store analysis runs to trusted users only.
Other vulnerabilities in CodeChecker
See all- CVE-2026-58106Low
In CodeChecker through 6.28.2, there is a flaw in ldlogger-tool-gcc.c:129 where the safe_strcpy() helper (which is strncpy()) writes 4096 bytes into a buffer of 4094 bytes, causing a 2-byte stack overflow on every invocation, independent of the input path's length. The fix for CVE-2025-40843 replaced unchecked strcpy() with a bounded safe_strcpy(), but the size passed was incorrect.
- CVE-2025-40843Medium
CodeChecker, an analyzer tooling, contains a buffer overflow vulnerability in the internal ldlogger library, which is executed by the CodeChecker log command. This affects versions up to 6.26.1.
Original NVD description (English source)
CodeChecker's massStoreRun processing path performs one-shot decompression of attacker-controlled, Base64-encoded zlib data without enforcing a maximum decompressed size. An authenticated user with permission to store analysis runs can submit a highly compressed payload that expands to a significantly larger byte sequence. Because the entire decompressed output is materialized in memory before being written to a temporary file, a sufficiently large payload may exhaust process or host memory and consume substantial disk space, resulting in denial of service.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS