How severe is CVE-2023-26147?

CVE-2023-26147 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2023-26147 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-26147?

CVE-2023-26147 affects Ithewei Libhv. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-26147?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-26147 published?

CVE-2023-26147 was published on 2023-09-29 and last updated on 2026-06-17.

CVE-2023-26147

CVE-2023-26147 is a medium-severity vulnerability in Ithewei Libhv with a CVSS 3.x base score of 5.3. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Ithewei Libhv
Published: 2023-09-29
Last modified: 2026-06-17

Description

All versions of the package ithewei/libhv are vulnerable to HTTP Response Splitting when untrusted user input is used to build headers values. An attacker can add the \r\n (carriage return line feeds) characters to end the HTTP response headers and inject malicious content, like for example additional headers or new response body, leading to a potential XSS vulnerability.

Frequently asked questions

What is CVE-2023-26147?: All versions of the package ithewei/libhv are vulnerable to HTTP Response Splitting when untrusted user input is used to build headers values. An attacker can add the \r\n (carriage return line feeds) characters to end the HTTP response headers and inject malicious content, like for example additional headers or new response body, leading to a potential XSS vulnerability.
How severe is CVE-2023-26147?: CVE-2023-26147 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2023-26147 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-26147?: CVE-2023-26147 affects Ithewei Libhv. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-26147?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-26147 published?: CVE-2023-26147 was published on 2023-09-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ithewei:libhv:*:*:*:*:*:*:*:*

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