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CVE-2018-13843

22
FAUCET Score

CVE-2018-13843 describes a memory leak vulnerability in HTSlib version 1.8, specifically within the bgzf_getline function in bgzf.c. This issue, while acknowledged by the maintainer as a "failure to free memory," is considered an application-level fix rather than a library defect. With a CVSS score of 7.5 (High), this vulnerability could lead to a denial of service (A:H) due to resource exhaustion, requiring no user interaction or privileges for an attacker to exploit over a network (AV:N/AC:L/PR:N/UI:N). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.8CPE matchmatch criteria
cpe:2.3:a:htslib:htslib:1.8:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.47%
Probability of exploitation in next 30 days
EPSS Percentile
71.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0147 is in the 52nd percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / samtools/htslib/issues/731
ExploitPatchThird Party Advisory