CVE-2026-1109
Published: 18 January 2026
Summary
CVE-2026-1109 is a medium-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Cijliu Librtsp. Its CVSS base score is 5.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 6.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Managed runtimes used by platform-independent applications (e.g., JVM, CLR) enforce memory safety, preventing most buffer overflows that require direct memory manipulation.
Ongoing control assessments and code testing (static/dynamic analysis, fuzzing) surface memory buffer restriction failures, which are then remediated before release.
Memory protections (e.g., W^X, ASLR) make exploitation of buffer-boundary violations far harder to turn into code execution.
Detects exploitation attempts that produce memory corruption, crashes, or anomalous behavior.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Local buffer overflow in library parsing function enables code execution for privilege escalation on affected host process.
NVD Description
A vulnerability was detected in cijliu librtsp up to 2ec1a81ad65280568a0c7c16420d7c10fde13b04. The impacted element is the function rtsp_parse_request. The manipulation results in buffer overflow. Attacking locally is a requirement. This product takes the approach of rolling releases to provide continious delivery.…
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Therefore, version details for affected and updated releases are not available. The vendor was contacted early about this disclosure but did not respond in any way.
Deeper analysisAI
CVE-2026-1109, published on 2026-01-18, is a buffer overflow vulnerability (CWE-119, CWE-120) in the rtsp_parse_request function of the cijliu librtsp library, affecting versions up to commit 2ec1a81ad65280568a0c7c16420d7c10fde13b04. The library employs a rolling release model for continuous delivery, so specific details on affected and updated releases are unavailable.
Exploitation requires local access (AV:L) with low privileges (PR:L), low attack complexity (AC:L), and no user interaction (UI:N), with an unchanged scope (S:U). A successful attack can achieve limited impacts on confidentiality, integrity, and availability (C:L/I:L/A:L), resulting in a CVSS 3.1 base score of 5.3.
Advisories from VulDB and a GitHub analysis document the issue but note no vendor response despite early disclosure contact, with no patches or mitigations provided.
Details
- CWE(s)