PatchTheCVECVE-2026-33809: A maliciously crafted TIFF file can cause image decoding to attempt to allocate up 4GiB of memory, causing eit
CVE-2026-33809 is a medium-severity flaw (CVSS 5.3) affecting tiff. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A maliciously crafted TIFF file can cause image decoding to attempt to allocate up 4GiB of memory, causing either excessive resource consumption or an out-of-memory error.
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 73%) |
| CISA exploited list | No |
| Weakness | CWE-434 |
| Published | 2026-03-25 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-33809?
tiff: upgrade to 0.38.0. Exact commands for each OS are on this page.
Is CVE-2026-33809 being exploited?
CVE-2026-33809 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-33809 affect?
CVE-2026-33809 affects tiff. Severity is medium (CVSS 5.3). A maliciously crafted TIFF file can cause image decoding to attempt to allocate up 4GiB of memory, causing either excessive resource consumption or an out-of-memory error.
How urgent is CVE-2026-33809?
Priority 30/100. Remotely exploitable, no login, no user action
Software pages
Related CVEs
- CVE-2026-46604 HIGH 7.5 UPGRADE The TIFF decoder can panic when decoding an invalid image with an out-of-bounds strip offset.