CVE-2026-68768

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreHIGH confidence

Score 6.1 from GitHub Security Advisory published 2026-08-22. a secondary CVSS source baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: Elevated riskExposed: 0

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

hashcat contains a heap-based buffer overflow (out-of-bounds write) in the outfile_write() function in src/outfile.c. When assembling output into a fixed-size buffer (HCBUFSIZ_LARGE, ~16 MB), the function sequentially appends the username, separator, hash, and plaintext via memcpy without validating that the accumulated length stays within the buffer capacity. When run with --username --show against a crafted hash file containing an oversized username that nearly fills the buffer, the total assembled output exceeds the buffer, causing a heap buffer overflow that can corrupt memory and crash the process.

CVSS v3
6.1
EG Score
6.1(high)
EG Risk
43(Track)
EG Risk 43/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity61% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

August 22, 2026

Last Modified

August 24, 2026

Advisory Details (5)

Auto-updated Aug 22, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

hashcat through 7.1.2 Heap Buffer Overflow in outfile_write() via Oversized Username | Advisories | VulnCheck

https://www.vulncheck.com/advisories/hashcat-through-heap-buffer-overflow-in-outfile-write-via-oversized-username
generic

hashcat/src/outfile.c at v7.1.2 · hashcat/hashcat · GitHub

https://github.com/hashcat/hashcat/blob/v7.1.2/src/outfile.c#L654-L668
github_commit

commit 68f56a2d8712 (hashcat/hashcat)

Fix landed in hashcat/hashcat commit 68f56a2d8712 — awaiting tagged release

https://github.com/hashcat/hashcat/commit/68f56a2d8712867a8520bf4dcf07f6145c23df89
generic

GitHub - hashcat/hashcat: World's fastest and most advanced password recovery utility · GitHub

https://github.com/hashcat/hashcat
generic

Coordinated Vulnerability Disclosure - Heap Buffer Overflow via Unchecked tmp_len in outfile_write() · Issue #4740 · hashcat/hashcat · GitHub

https://github.com/hashcat/hashcat/issues/4740

Vendor Advisories for CVE-2026-68768(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 22× in last 7d / 25× 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. 2026-08-30 01:59 UTCEG score recompute
  2. 2026-08-30 01:59 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-29 01:00 UTCEG score recompute
  5. 2026-08-29 01:00 UTCGHSA enrichment
  6. 2026-08-28 21:42 UTCEPSS rescore
  7. 2026-08-27 22:37 UTCEG score recompute
  8. 2026-08-27 22:37 UTCGHSA enrichment
  9. 2026-08-26 21:39 UTCEG score recompute
  10. 2026-08-26 21:39 UTCGHSA enrichment
  11. 2026-08-26 14:47 UTCEPSS rescore
  12. 2026-08-25 20:37 UTCEG score recompute
  13. 2026-08-25 20:37 UTCGHSA enrichment
  14. 2026-08-25 13:49 UTCEPSS rescore
  15. 2026-08-24 19:26 UTCEG score recompute
  16. 2026-08-24 19:26 UTCGHSA enrichment
  17. 2026-08-24 18:51 UTCEG score recompute
  18. 2026-08-24 18:51 UTCGHSA enrichment
  19. 2026-08-24 17:23 UTCEG score recompute
  20. 2026-08-24 17:23 UTCGHSA enrichment
  21. 2026-08-23 16:22 UTCEG score recompute
  22. 2026-08-23 16:22 UTCGHSA enrichment
  23. 2026-08-22 15:24 UTCEG score recompute
  24. 2026-08-22 14:26 UTCEG score recompute
  25. 2026-08-22 14:25 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-68768?
CVE-2026-68768 is a medium vulnerability published on August 22, 2026. hashcat contains a heap-based buffer overflow (out-of-bounds write) in the outfilewrite() function in src/outfile.c. When assembling output into a fixed-size buffer (HCBUFSIZLARGE, ~16 MB), the function sequentially appends the username, separator, hash, and plaintext via memcpy without validating…
When was CVE-2026-68768 disclosed?
CVE-2026-68768 was first published in the National Vulnerability Database on August 22, 2026, with the most recent update on August 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-68768 actively exploited?
CVE-2026-68768 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 96.3% of all scored CVEs.
What is the CVSS score of CVE-2026-68768?
CVE-2026-68768 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-68768?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68768, 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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