CVE-2026-44353
CVE-2026-44353 is a medium-severity vulnerability in Streamlink with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.
Key facts
- Severity: Medium (CVSS 3.x base score 6.5)
- EPSS exploit prediction: 0% (27th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-32559
- Weakness: CWE-22
- Affected product: Streamlink
- Published:
- Last modified:
Description
Streamlink is a CLI utility which pipes video streams from various services into a video player. Prior to 8.4.0, Streamlink's HLS and DASH parsers do not validate the URI scheme of segment entries and other resources. A remote .m3u8 HLS playlist or .mpd DASH manifest can list file:///path/to/file as a segment, and streamlink will read that local file and write its contents to the output stream. This vulnerability is fixed in 8.4.0.
Frequently asked questions
- What is CVE-2026-44353?
- Streamlink is a CLI utility which pipes video streams from various services into a video player. Prior to 8.4.0, Streamlink's HLS and DASH parsers do not validate the URI scheme of segment entries and other resources. A remote .m3u8 HLS playlist or .mpd DASH manifest can list file:///path/to/file as a segment, and streamlink will read that local file and write its contents to the output stream. This vulnerability is fixed in 8.4.0.
- How severe is CVE-2026-44353?
- CVE-2026-44353 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2026-44353 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-44353?
- CVE-2026-44353 affects Streamlink. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-44353?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-44353 have an EU (EUVD) identifier?
- Yes. CVE-2026-44353 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32559.
- When was CVE-2026-44353 published?
- CVE-2026-44353 was published on 2026-05-27 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:streamlink:streamlink:*:*:*:*:*:python:*:*
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