How severe is CVE-2018-7648?

CVE-2018-7648 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-7648 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-7648?

CVE-2018-7648 affects Uclouvain Openjpeg. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-7648?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-7648 published?

CVE-2018-7648 was published on 2018-03-02 and last updated on 2026-06-17.

CVE-2018-7648

CVE-2018-7648 is a critical-severity vulnerability in Uclouvain Openjpeg with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Uclouvain Openjpeg
Published: 2018-03-02
Last modified: 2026-06-17

Description

An issue was discovered in mj2/opj_mj2_extract.c in OpenJPEG 2.3.0. The output prefix was not checked for length, which could overflow a buffer, when providing a prefix with 50 or more characters on the command line.

Frequently asked questions

What is CVE-2018-7648?: An issue was discovered in mj2/opj_mj2_extract.c in OpenJPEG 2.3.0. The output prefix was not checked for length, which could overflow a buffer, when providing a prefix with 50 or more characters on the command line.
How severe is CVE-2018-7648?: CVE-2018-7648 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-7648 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-7648?: CVE-2018-7648 affects Uclouvain Openjpeg. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-7648?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-7648 published?: CVE-2018-7648 was published on 2018-03-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:uclouvain:openjpeg:2.3.0:*:*:*:*:*:*:*

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