Vulnerability · Published Aug 24, 2026 · Assigned by mitre
CVE-2026-52490
Critical 9.8
In plain English
A critical-severity code injection in the libtiff package (AlmaLinux). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.7%top 45.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
An issue in libtiff 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938 allows an attacker to execute arbitrary code via the process_command_opts() function in tools/tiffcrop.c
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | libtiff | 4.0.9-39.el8_10 | ALSA-2026:69095 |
| AlmaLinux:8 | libtiff-devel | 4.0.9-39.el8_10 | ALSA-2026:69095 |
| AlmaLinux:8 | libtiff-tools | 4.0.9-39.el8_10 | ALSA-2026:69095 |
| Debian:12 | tiff | no fix listed | DEBIAN-CVE-2026-52490 |
| Debian:13 | tiff | no fix listed | DEBIAN-CVE-2026-52490 |
| Debian:14 | tiff | 4.7.2-1 | DEBIAN-CVE-2026-52490 |
| Rocky Linux:8 | libtiff | 0:4.0.9-39.el8_10 | RLSA-2026:69095 |
Affected products (as reported)
Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H