In HTSlib 1.8, a race condition in cram/cram_io.c might allow local users to overwrite arbitrary files via a symlink attack.

published 2018-07-17 8y ago modified 2026-06-17 4mo ago also EUVD-2018-6251

cvss: 4.7; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 16%
public exploits: 0; none known

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Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

github.com https://github.com/samtools/htslib/issues/736 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	4.7	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD	2.0	3.3	AV:L/AC:M/Au:N/C:N/I:P/A:P

Classification

Weakness

CWE-59 Improper Link Resolution Before File Access
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

github.com /samtools/htslib/issues/736
exploit, third-party-advisory

Sources

CVE List CVE-2018-14329
NVD CVE-2018-14329

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