High 7.5Published Jun 17, 2026

CVE-2026-54417Integer Overflow in rxi/microtar mtar_next() Causes Infinite Loop DoS

Updated under an hour ago (Oct 28, 2026, 5:00 AM ET)

Does this affect you?

It affects rxi microtar. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for rxi microtar

Exploited in the last 30 days

An integer overflow in the mtar_next function in src/microtar.c in rxi microtar 0.1.0 allows a remote attacker to cause a denial of service (uncontrolled CPU consumption / infinite loop) via a crafted tar archive. mtar_next computes the offset to the next record as round_up(h.size, 512) + sizeof(mtar_raw_header_t) using 32-bit arithmetic.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-190, CWE-835
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: TuranSec
NVD analysis: Deferred
Record last updated: Aug 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

rxi microtar rxi:microtar (from the name)	0.1.0	CNA record

References

References

https://github.com/rxi/microtar/blob/master/src/microtar.c#L239	product
https://github.com/rxi/microtar	product
https://raw.githubusercontent.com/rxi/microtar/master/src/microtar.c	technical-description

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.