CVE-2026-50593 in Graphite
Summary
by MITRE • 06/05/2026
Graphite before 1.3.15 has an integer underflow and resultant out-of-bounds write via Graphite actions, because slotat does not ensure that an offset is within the allowed slot-map range.
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Analysis
by VulDB Data Team • 06/05/2026
The vulnerability in Graphite versions prior to 1.3.15 represents a critical security flaw that stems from improper input validation within the slotat function, which is responsible for managing slot-map operations. This integer underflow condition occurs when the system fails to validate that an offset parameter remains within the permissible bounds of the slot-map range, creating a scenario where maliciously crafted input can cause the application to write data beyond the allocated memory boundaries. The underlying technical issue manifests as an integer underflow in the slotat function, which is a core component of Graphite's action processing mechanism, allowing attackers to manipulate memory layout through carefully constructed inputs that bypass normal range checking procedures.
The operational impact of this vulnerability extends beyond simple memory corruption, as it enables attackers to execute arbitrary code within the Graphite application context, potentially leading to complete system compromise. When the offset parameter underflows, the system allocates memory in an unintended location, creating opportunities for out-of-bounds writes that can overwrite critical application data structures or even executable code segments. This vulnerability aligns with CWE-190, which specifically addresses integer overflow and underflow conditions, and represents a classic example of how improper integer handling can lead to memory safety violations. The flaw operates at the intersection of memory management and input validation, where the lack of proper boundary checking creates exploitable conditions that can be leveraged through various attack vectors.
Security researchers have identified that this vulnerability can be exploited through crafted Graphite actions that manipulate the offset parameter to trigger the underflow condition, making it particularly dangerous in environments where Graphite processes untrusted input from external sources. The attack surface includes any system component that relies on Graphite's slotat functionality for managing slot-map operations, which may encompass various data processing and storage operations within the application. Mitigation strategies should focus on implementing proper integer range validation, ensuring that all offset parameters are verified against the maximum allowable slot-map boundaries before any memory operations are performed. Organizations should also consider applying the patched version of Graphite 1.3.15 or later, which includes enhanced input validation mechanisms that prevent the integer underflow condition from occurring. Additionally, runtime protections such as address space layout randomization and stack canaries may provide additional defense-in-depth measures against exploitation attempts. The vulnerability demonstrates the critical importance of proper input validation and memory safety practices, particularly in systems that handle complex data structures and memory management operations, aligning with ATT&CK technique T1059.007 for execution through scripting and T1021.004 for remote services that may be compromised through such memory corruption vulnerabilities.