CVE-2026-17435
What it is
File::Rotate::Simple versions before 0.4.0 for Perl create the target of dangling symlinks when rotating files. When the file to be rotated is a symbolic link to a missing file, and the touch option is enabled, then the rotate method assumes that the file is absent (since the existence check is against the target), and does not rotate it. But it touches the file, which creates the target. An attacker that has the ability to create the symlink can use this to create an arbitrary file with permissions of the process rotating the files (which may be different from the process that normally writes to the log file that is being rotated). Note that the touch option is disabled by default.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. Limited direct impact.
- Exploit odds
- 0.1% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.1% in the next 30 days (EPSS).
- Severity: 2.5 LOW (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.1% · EPSS, next 30 days
- Weakness
- CWE-59
- Record status
- Deferred
Attack profile CVSS 3.1 · 2.5
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Raw vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-17435.md and follow it. Check whether this project is affected by CVE-2026-17435. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/robrwo/File-Rotate-Simple/commit/ead3f5c0e51217b34d286aa243949dba60b39eba.patch
- https://github.com/robrwo/File-Rotate-Simple/security/advisories/GHSA-fpmm-8f6h-wv74
References
- https://github.com/robrwo/File-Rotate-Simple/commit/ead3f5c0e51217b34d286aa243949dba60b39eba.patch
- https://github.com/robrwo/File-Rotate-Simple/security/advisories/GHSA-fpmm-8f6h-wv74
- https://metacpan.org/release/RRWO/File-Rotate-Simple-v0.4.0/changes
- http://www.openwall.com/lists/oss-security/2026/08/07/7