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CVE-2026-0708

25
FAUCET Score

CVE-2026-0708 is a high-severity vulnerability (CVSS 8.3) found in the libucl library, allowing a remote attacker to cause a Denial of Service. This occurs when specially crafted Universal Configuration Language (UCL) input, containing a key with an embedded null byte, triggers a segmentation fault in the `ucl_object_emit` function. The attack vector is remote with low complexity, but requires user interaction. There is currently no evidence of active exploitation, nor is public exploit code available for this vulnerability. Community discussion regarding this CVE is minimal.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.9.4CPE matchmatch criteria
cpe:2.3:a:vstakhov:libucl:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.39%
Probability of exploitation in next 30 days
EPSS Percentile
31.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0039 is in the 32nd percentile among its peer group of 26,221 CVEs.

Social Chatter

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

Vendor Patches (1)

github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2026-0708Important

libucl: libucl: Denial of Service via embedded null byte in UCL input

May 15, 2025

References

access.redhat.com / security/cve/CVE-2026-0708
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
github.com / vstakhov/libucl/issues/323
ExploitIssue TrackingVendor Advisory