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VulnerabilityPublished Updated

CVE-2026-49337: strukturag libde265 · Unthrottled Resource Allocation

Affects strukturag libde265Source CVE Database V5

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Not known to be exploited · CVSS 4.3 Medium : upgrade to 1.0.20 when convenient.

Data as of 1 Nov 2026, 11:03 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.0.20
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Jun 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 1 Nov 2026.

What to do

Upgrade libde265 and strukturag/libde265 to 1.0.20.

Affected software

ProductAffectedFixed in
strukturaglibde265Affected
  • <1.0.20
Fixed in
  • 1.0.20
GitHubstrukturag/libde265pkg:github/strukturag/libde265Other threatsAffected
  • <1.0.20
Fixed in
  • 1.0.20

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade libde265 to version 1.0.20 or later, where this issue is patched. No other mitigation is indicated.

Description

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted sequence of H.265 NAL units causes `decoder_context::read_slice_NAL()` (`libde265/decctx.cc:481`) to attach slice headers to a finished picture object that has no active image unit, resulting in attacker-controlled unbounded heap growth. The retained headers are never freed until the picture is released, which may not happen during continuous streaming. Version 1.0.20 patches the issue.

References

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