cijliu librtsp rtsp_parse_request buffer overflow

published 2026-01-18 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-3186

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 17%
public exploits: 0; none known

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. 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.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 9 mo ago (2026-01-20)

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/fizz-is-on-the-way/vuls_protocol/blob/main/librtsp_rtsp_parse_request/librtsp_rtsp_parse_request.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	4.8	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
CNA	3.1	5.3	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	3.0	5.3	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	2.0	4.3	AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
CNA	4.0	1.9	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	5.3	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	2.0	4.3	AV:L/AC:L/Au:S/C:P/I:P/A:P

Affected products

cijliu librtsp

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

github.com /fizz-is-on-the-way/vuls_protocol/blob/main/librtsp_rtsp_parse_request/librtsp_rtsp_parse_request.md
related, exploit, third-party-advisory
vuldb.com /?id.341701
vdb-entry, technical-description, third-party-advisory
vuldb.com /?ctiid.341701
signature, permissions-required, vdb-entry
vuldb.com /?submit.732599
third-party-advisory, vdb-entry

Sources

CVE List CVE-2026-1109
NVD CVE-2026-1109

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary