Buffer overflow in Aous72 Openjph
CVE-2026-111151
OpenJPH through 0.32.0 contains a heap out-of-bounds write vulnerability in the HTJ2K cleanup-pass decoder that allows attackers to corrupt memory via one-row codeblocks. Attackers can supply a crafted .j2c or .jph codestream with small precinct sizes, causing the decoder to write a second row past the codeblock buffer, resulting in memory corruption and crashes.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind-pwn/openjph-htj2k-degenerate-codeblock-cleanup-oob-write (technical-description, exploit)
- github.com/aous72/OpenJPH/blob/23c422895ce6c3a156935222e4715ee0b7be952c/src/cor… (technical-description)
- github.com/aous72/OpenJPH/blob/23c422895ce6c3a156935222e4715ee0b7be952c/src/cor… (technical-description)
- github.com/aous72/OpenJPH/blob/23c422895ce6c3a156935222e4715ee0b7be952c/src/cor… (technical-description)
- github.com/aous72/OpenJPH (product)
- www.vulncheck.com/advisories/openjph-through-0.32.0-heap-out-of-bounds-write-in… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111151?
- CVE-2026-111151 is a medium-severity vulnerability in Aous72 Openjph, classified under Out-of-bounds Write. CVSS score: 6.1/10. Published 2026-10-15.
- How severe is CVE-2026-111151?
- Medium severity. CVSS v3 base score is 6.1 out of 10.