9.8Critical
CVE-2026-55211
Surfio is a library for reading and writing surface files. Prior to 0.0.19, surfio does not correctly validate size fields in IRAP files, leading to a buffer overflow when untrusted files are parsed. The severity assumes surfio is used to parse untrusted files in a networking context such as a web service. This issue is fixed in version 0.0.19.
What this means for your business
- An attacker can use it remotely, over a network, without a login, and without anyone at your company clicking anything.
What to do
- 1Ask your IT team or provider whether any of your systems use the affected product.
- 2If you do, follow the vendor's guidance. No patch reference has been published yet.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 9.8 (v3.0)
- Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness
- CWE-125
- Assigned by
- security-advisories@github.com
Dates
- Published
- 2026-09-15
- Last modified
- 2026-09-17
- Sources
- NVD
References
- https://github.com/equinor/surfio/commit/1619750bce28e39c4f378d2fb6d28b72380a12aa
- https://github.com/equinor/surfio/commit/e009c0cad145484f854aeb22d1979f9216b291db
- https://github.com/equinor/surfio/pull/86
- https://github.com/equinor/surfio/releases/tag/0.0.19
- https://github.com/equinor/surfio/security/advisories/GHSA-rcr2-hggw-43wm