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VulnerabilityPublished

CVE-2026-125040: GStreamer's gst-plugins-base · ReDoS

Source GCVE Database

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Authoritative record:CVE-2026-125040· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium.

Data as of 9 Nov 2026, 22:20 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.16.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10gstreamer1-plugins-baseAffected–Fixed in–
Red Hat Enterprise Linux 7gstreamer1-plugins-baseAffected–Fixed in–
Red Hat Enterprise Linux 8gstreamer1-plugins-baseAffected–Fixed in–
Red Hat Enterprise Linux 9gstreamer1-plugins-baseAffected–Fixed in–

Description

A flaw was found in the SRT and WebVTT subtitle parser in GStreamer's gst-plugins-base. While sanitizing inline subtitle markup, the parser repeatedly searches the remaining text with unanchored regular expressions. A crafted subtitle cue with a long line of unmatched markup-like text can force quadratic CPU use and make a GStreamer-based application unresponsive.

References

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