CVE-2026-57437

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 77% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this week
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.

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::XPathContext did not keep its source document alive for garbage collection. If an XPathContext outlived its document and the document was collected, evaluating an XPath expression could read invalid memory and potentially segfault. This is only reachable when application code constructs an XPathContext directly and lets the document become unreachable while continuing to use the context. The normal Document#xpath, #css, and related search methods are not affected, and it is not triggerable by malicious document input. This vulnerability is fixed in 1.19.4.

CVSS v3
5.3
EG Score
5.3(medium)
EPSS
23.1%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 26, 2026

Advisory Details (1)

Auto-updated Jun 27, 2026
Patch available. Sources: github.
github Patch Available

Possible Use-After-Free when directly using `NokogirI::XML::XPathContext` beyond document lifetime · Advisory · sparklemotion/nokogiri · GitHub

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-p67v-3w7g-wjg7

Vendor Advisories for CVE-2026-57437(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 25× in last 7d / 34× 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. 2026-07-07 06:46 UTCEG score recompute
  2. 2026-07-07 06:46 UTCVendor advisory
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 07:15 UTCEG score recompute
  6. 2026-07-06 07:15 UTCVendor advisory
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 07:53 UTCEG score recompute
  10. 2026-07-05 07:53 UTCVendor advisory
  11. 2026-07-05 02:31 UTCEPSS rescore
  12. 2026-07-05 02:30 UTCEPSS rescore
  13. 2026-07-04 08:35 UTCEG score recompute
  14. 2026-07-04 08:35 UTCVendor advisory
  15. 2026-07-04 06:31 UTCEPSS rescore
  16. 2026-07-04 06:31 UTCEPSS rescore
  17. 2026-07-03 09:16 UTCEG score recompute
  18. 2026-07-03 09:16 UTCVendor advisory
  19. 2026-07-02 09:56 UTCEG score recompute
  20. 2026-07-02 09:56 UTCVendor advisory
  21. 2026-07-01 15:07 UTCEPSS rescore
  22. 2026-07-01 10:38 UTCEG score recompute
  23. 2026-07-01 10:38 UTCVendor advisory
  24. 2026-06-30 23:22 UTCEPSS rescore
  25. 2026-06-30 11:19 UTCEG score recompute
Show 9 more
  1. 2026-06-29 14:06 UTCEPSS rescore
  2. 2026-06-29 11:51 UTCEG score recompute
  3. 2026-06-28 14:07 UTCEPSS rescore
  4. 2026-06-28 12:32 UTCEG score recompute▲ 3.60
  5. 2026-06-28 04:56 UTCEPSS rescore
  6. 2026-06-27 03:08 UTCEPSS rescore
  7. 2026-06-26 17:41 UTCNVD updateCVSS v3 → 5.3 · severity → MEDIUM
  8. 2026-06-25 15:48 UTCEG score recompute
  9. 2026-06-25 15:47 UTCNVD updatefirst tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-57437?
CVE-2026-57437 is a medium vulnerability published on June 25, 2026. Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::XPathContext did not keep its source document alive for garbage collection. If an XPathContext outlived its document and the document was collected, evaluating an XPath expression…
When was CVE-2026-57437 disclosed?
CVE-2026-57437 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57437 actively exploited?
CVE-2026-57437 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 23.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-57437?
CVE-2026-57437 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-57437?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57437, 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.

Dependency Blast Radius

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