CVE-2026-68768

MEDIUMPre-NVD 6.16.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this weekElevated
6.1EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.1Exploit: No code on recordExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

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
6.1MEDIUMmedium confidence
EG Risk
43
EG Risk 43/100

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 (value × EchelonGraph’s weight)
Severity61% × 45%
The EG Score, 6.1 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.2%
EPSS %ILE
10th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 22, 2026

Last Modified

September 24, 2026

Advisory Details (5)

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

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
Web page

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
Web page

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

https://github.com/hashcat/hashcat
Web page

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.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
hashcat6.2.6+ds1-1 ... 7.1.2+ds1-4 (6 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
hashcat6.2.6+ds2-1, 7.1.2+ds1-1, 7.1.2+ds1-2, 7.1.2+ds1-3, 7.1.2+ds1-4
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
hashcat6.2.6+ds2-1, 7.1.2+ds1-1, 7.1.2+ds1-2, 7.1.2+ds1-3, 7.1.2+ds1-4
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 72× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 133 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 33 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  3. 2026-10-12 15:44 UTCEG score recompute
  4. 2026-10-11 19:30 UTCEG score recompute
  5. 2026-10-11 16:45 UTCEG score recompute
  6. 2026-10-11 14:06 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  9. 2026-10-10 16:35 UTCEG score recompute
  10. 2026-10-10 16:35 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  12. 2026-10-09 05:58 UTCEG score recompute
  13. 2026-10-09 05:58 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  15. 2026-10-08 04:59 UTCEG score recompute
  16. 2026-10-08 04:59 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  18. 2026-10-07 04:00 UTCEG score recompute
  19. 2026-10-07 04:00 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  21. 2026-10-06 03:01 UTCEG score recompute
  22. 2026-10-06 03:01 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  23. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  24. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  25. 2026-10-04 20:46 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
Show 75 more
  1. 2026-10-03 16:38 UTCEG score recompute
  2. 2026-10-03 16:38 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  3. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  4. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  5. 2026-10-02 09:34 UTCEG score recompute
  6. 2026-10-02 09:34 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  7. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  8. 2026-10-01 08:36 UTCEG score recompute
  9. 2026-10-01 08:36 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  10. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  11. 2026-09-30 07:32 UTCEG score recompute
  12. 2026-09-30 07:32 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  13. 2026-09-29 03:19 UTCEG score recompute
  14. 2026-09-29 03:19 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  15. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  16. 2026-09-28 02:06 UTCEG score recompute
  17. 2026-09-28 02:06 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  18. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  19. 2026-09-27 01:06 UTCEG score recompute
  20. 2026-09-27 01:06 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  21. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  22. 2026-09-24 21:20 UTCEG score recompute
  23. 2026-09-24 21:20 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  24. 2026-09-23 20:40 UTCEG score recompute
  25. 2026-09-23 20:40 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  26. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  27. 2026-09-22 19:42 UTCEG score recompute
  28. 2026-09-22 19:42 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  29. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  30. 2026-09-21 15:19 UTCEG score recompute
  31. 2026-09-21 15:19 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  32. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  33. 2026-09-20 13:42 UTCEG score recompute
  34. 2026-09-20 13:42 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  35. 2026-09-19 12:43 UTCEG score recompute
  36. 2026-09-19 12:43 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  37. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  38. 2026-09-18 11:39 UTCEG score recompute
  39. 2026-09-18 11:39 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  40. 2026-09-17 10:36 UTCEG score recompute
  41. 2026-09-17 10:36 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  42. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  43. 2026-09-16 09:33 UTCEG score recompute
  44. 2026-09-16 09:33 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  45. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  46. 2026-09-15 07:35 UTCEG score recompute
  47. 2026-09-15 07:35 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  48. 2026-09-14 06:36 UTCEG score recompute
  49. 2026-09-14 06:36 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  50. 2026-09-13 05:37 UTCEG score recompute
  51. 2026-09-13 05:37 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  52. 2026-09-12 04:38 UTCEG score recompute
  53. 2026-09-12 04:38 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  54. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  55. 2026-09-11 03:39 UTCEG score recompute
  56. 2026-09-11 03:39 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  57. 2026-09-10 02:40 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  58. 2026-09-09 01:42 UTCEG score recompute
  59. 2026-09-09 01:42 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  60. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  61. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  62. 2026-09-07 10:18 UTCEG score recompute
  63. 2026-09-07 10:18 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  64. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  65. 2026-09-06 09:16 UTCEG score recompute
  66. 2026-09-06 09:16 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  67. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  68. 2026-09-05 08:10 UTCEG score recompute
  69. 2026-09-05 08:10 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  70. 2026-09-04 07:11 UTCEG score recompute
  71. 2026-09-04 07:11 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  72. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  73. 2026-09-03 06:06 UTCEG score recompute
  74. 2026-09-03 06:06 UTCGHSA enrichmentGHSA-cm34-rh84-36rf · GitHub CVSS 6.1
  75. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 3rd percentile

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Frequently asked(5)

What is CVE-2026-68768?
CVE-2026-68768 is a medium-severity vulnerability; its CVE record was 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 made public?
CVE-2026-68768 was made public on July 31, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 22, 2026. EchelonGraph's copy of the record carries a last-modified date of September 24, 2026; the record at its source may have been updated since.
Is CVE-2026-68768 actively exploited?
CVE-2026-68768 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-68768?
CVE-2026-68768 has a CVSS base score of 6.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-68768?
An upstream fix for CVE-2026-68768 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-68768 are linked in the Vendor Advisories panel on this page.

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