CVE-2023-26147

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2023-09-29. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.3
EG Score
5.3(medium)
EPSS
30.0%
KEV
Not listed

Published

September 29, 2023

Last Modified

November 21, 2024

References (4)

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 08:25 UTCEPSS rescore
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  3. 2026-07-09 19:08 UTCEPSS rescore
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  1. 2026-06-22 14:24 UTCEPSS rescore
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  7. 2026-06-19 19:24 UTCEPSS rescore
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  9. 2026-06-18 17:51 UTCEPSS rescore
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  21. 2026-06-10 22:17 UTCEPSS rescore
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  40. 2026-06-01 13:51 UTCEPSS rescore
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  42. 2026-05-31 22:29 UTCEPSS rescore
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  47. 2026-05-29 13:43 UTCEPSS rescore
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  49. 2026-05-28 13:43 UTCEPSS rescore
  50. 2026-05-28 13:43 UTCEPSS rescore
  51. 2026-05-27 13:39 UTCEPSS rescore
  52. 2026-05-26 13:43 UTCEPSS rescore
  53. 2026-05-26 13:43 UTCEPSS rescore
  54. 2026-05-26 07:18 UTCEPSS rescore
  55. 2026-05-26 07:17 UTCEPSS rescore
  56. 2026-05-26 07:17 UTCEPSS rescore
  57. 2026-05-24 16:51 UTCEG score recompute
  58. 2026-05-24 16:51 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-26147?
CVE-2023-26147 is a medium vulnerability published on September 29, 2023. 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…
When was CVE-2023-26147 disclosed?
CVE-2023-26147 was first published in the National Vulnerability Database on September 29, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-26147 actively exploited?
CVE-2023-26147 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-26147?
CVE-2023-26147 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2023-26147?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-26147, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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