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
Elevated

Also known asEUVD-2026-64313 (ENISA EUVD) · GHSA-cm34-rh84-36rf (GitHub Security Advisories)Source: ENISA EUVD

6.1EG
EchelonGraph verdictPlan mitigationThe upstream fix is not in a release yet: until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it (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 impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity61% × 45%
Impact severity (EG Severity): CVSS 6.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
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. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it.
EPSS PROB
0.2%
EPSS %ILE
11th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.1): severity, escalated by confirmed exploitation. This CVE's 6.1 is its impact severity (EG Severity), not escalated.

EG Severity
6.1 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it.

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.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: 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

October 14, 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 8× in last 7d / 54× 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 159 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 59 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

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

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 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…
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 October 14, 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 (11th 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.

Dependency Blast Radius

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