CVE-2026-38639

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-26. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

An issue in the parse_month function (/time/strptime.rs) of relibc commit ab6a2e allows attackers to cause a Denial of Service (DoS) via parsing a crafted input.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
35.8%
KEV
Not listed

Published

June 26, 2026

Last Modified

June 29, 2026

Advisory Details (4)

Auto-updated Jun 29, 2026
No patch confirmed yet.
generic

Panic in `parse_month` when parsing month names with multibyte characters (#265) · Issues · redox-os / relibc · GitLab

https://gitlab.redox-os.org/redox-os/relibc/-/work_items/265
generic

fix: handle char boundary in `parse_weekday` and `parse_month` (!990) · Merge requests · redox-os / relibc · GitLab

https://gitlab.redox-os.org/redox-os/relibc/-/merge_requests/990
generic

Panic in `parse_month` when parsing month names with multibyte characters (#265) · Issues · redox-os / relibc · GitLab

https://gitlab.redox-os.org/redox-os/relibc/-/issues/265
generic

pocs/redox/CVE-2026-38639 at master · Marsman1996/pocs · GitHub

https://github.com/Marsman1996/pocs/tree/master/redox/CVE-2026-38639

Vendor Advisories for CVE-2026-38639(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 34× in last 7d / 41× 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. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 15:39 UTCEG score recompute
  4. 2026-07-06 15:39 UTCGHSA enrichment
  5. 2026-07-06 02:52 UTCEG score recompute
  6. 2026-07-06 02:52 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 14:05 UTCEG score recompute
  10. 2026-07-05 14:05 UTCGHSA enrichment
  11. 2026-07-05 02:30 UTCEPSS rescore
  12. 2026-07-05 01:15 UTCEG score recompute
  13. 2026-07-05 01:14 UTCGHSA enrichment
  14. 2026-07-04 12:12 UTCEG score recompute
  15. 2026-07-04 12:12 UTCGHSA enrichment
  16. 2026-07-04 06:31 UTCEPSS rescore
  17. 2026-07-03 23:25 UTCEG score recompute
  18. 2026-07-03 23:25 UTCGHSA enrichment
  19. 2026-07-03 10:39 UTCEG score recompute
  20. 2026-07-03 10:39 UTCGHSA enrichment
  21. 2026-07-02 21:49 UTCEG score recompute
  22. 2026-07-02 21:49 UTCGHSA enrichment
  23. 2026-07-02 09:04 UTCEG score recompute
  24. 2026-07-02 09:03 UTCGHSA enrichment
  25. 2026-07-01 20:15 UTCEG score recompute
Show 16 more
  1. 2026-07-01 20:15 UTCGHSA enrichment
  2. 2026-07-01 15:06 UTCEPSS rescore
  3. 2026-07-01 07:29 UTCEG score recompute
  4. 2026-07-01 07:29 UTCGHSA enrichment
  5. 2026-06-30 23:22 UTCEPSS rescore
  6. 2026-06-30 18:43 UTCEG score recompute
  7. 2026-06-30 18:43 UTCGHSA enrichment
  8. 2026-06-30 05:57 UTCEG score recompute
  9. 2026-06-30 05:57 UTCGHSA enrichment
  10. 2026-06-29 17:11 UTCEG score recompute▲ 7.50
  11. 2026-06-29 17:10 UTCGHSA enrichment
  12. 2026-06-29 14:52 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  13. 2026-06-29 14:06 UTCEPSS rescore
  14. 2026-06-28 04:56 UTCEPSS rescore
  15. 2026-06-26 21:37 UTCEG score recompute
  16. 2026-06-26 21:37 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-38639?
CVE-2026-38639 is a high vulnerability published on June 26, 2026. An issue in the parse_month function (/time/strptime.rs) of relibc commit ab6a2e allows attackers to cause a Denial of Service (DoS) via parsing a crafted input.
When was CVE-2026-38639 disclosed?
CVE-2026-38639 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-38639 actively exploited?
CVE-2026-38639 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 35.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-38639?
CVE-2026-38639 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-38639?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-38639, 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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