CVE-2026-111273CWE-193

CVE-2026-111273

Medium · published October 16, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
3.3
In the wild
Unconfirmed
What it is

unarr through 1.1.1 contains an off-by-one heap-based buffer overflow in tar_get_name() in tar/parse-tar.c, reachable through the ar_entry_get_name() API. Attackers can supply a crafted TAR archive with a full ustar prefix and name to write a NUL byte past the allocation, corrupting heap memory and crashing the process.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
CVSS v4.0
6.9 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
EPSS
0.00143 · 3.3th percentile
Weakness
CWE-193 · Off-by-one Error
Published
2026-10-16T02:19Z
References (5)
https://github.com/selmf/unarr · [email protected]https://github.com/selmf/unarr/blob/b211040df83dee513362cdeb9bd87afa26fd5e38/tar/parse-tar.c#L242-L254 · [email protected]https://hackmd.io/@haind-pwn/unarr-tar-zip-oob · [email protected]https://www.vulncheck.com/advisories/unarr-through-1.1.1-off-by-one-heap-buffer-overflow-via-tar-get-name · [email protected]https://hackmd.io/@haind-pwn/cve-2026-111273-111274-unarr-tar-zip-oob · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 15 OCT 21:43Z
    unarr through 1.1.1 Off-by-One Heap Buffer Overflow via tar_get_name
    cvelistv5
  • 15 OCT 21:43Z
    unarr through 1.1.1 Off-by-One Heap Buffer Overflow via tar_get_name
    cvelistv5