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CVE-2026-120436VulnerabilityPublished Updated

Netpbm free: Netpbm before 10.86.51, 11.x before 11.02.30, and 11.03 before 11.15.08 contains an integer overflow in

Affects netpbm-freeSource GCVE Database

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Authoritative record:CVE-2026-120436· High 8.5

Not known to be exploited · CVSS 8.5 High.

Data as of 5 Nov 2026, 12:36 UTC

CVSS 4.0 base score
8.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulnCheck)CVSS 4.08.5
CNA (VulnCheck)CVSS 3.17.8
CNACVSS 4.08.5
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 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 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10netpbm-freepkg:deb/ubuntu/netpbm-free?arch=source&distro=stonkingOther threatsAffected
  • =2:11.10.02-1build1
  • =2:11.13.03+ds-2
Fixed in–
Ubuntu 26.04 LTSnetpbm-freepkg:deb/ubuntu/netpbm-free?arch=source&distro=resoluteOther threatsAffected
  • =2:11.10.02-1build1
Fixed in–
Ubuntu 24.04 LTSnetpbm-freepkg:deb/ubuntu/netpbm-free?arch=source&distro=nobleOther threatsAffected
  • 2:11.01.00-2build1 – 2:11.05.02-1.1build1
7 affected builds
Fixed in–
Ubuntu 22.04 LTSnetpbm-freepkg:deb/ubuntu/netpbm-free?arch=source&distro=jammyOther threatsAffected
  • =2:10.0-15.4
Fixed in–
Ubuntu 20.04 LTSnetpbm-freepkg:deb/ubuntu/netpbm-free?arch=source&distro=focalOther threatsAffected
  • =2:10.0-15.3build1
Fixed in–
Ubuntu 18.04 LTSnetpbm-freepkg:deb/ubuntu/netpbm-free?arch=source&distro=bionicOther threatsAffected
  • =2:10.0-15.3build1
Fixed in–

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

Description

Netpbm versions before 10.86.51, 11.x before 11.02.30, and 11.03 before 11.15.08 contain an integer overflow vulnerability in the jbigtopnm component. This flaw causes a heap buffer overflow when calculating the output buffer size. An attacker can exploit this by supplying a crafted multi-plane JBIG file with large header dimensions, leading to a buffer overflow in jbg_dec_merge_planes(), potentially causing application crashes or arbitrary code execution.

References

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