CVE-2026-81680

MEDIUMNVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.2% (9th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 4.0 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-08-27) is not newer than that change (2026-10-01), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

openssl_encrypt versions before 1.4.9 fail to authenticate recovery-slot presence in envelope-format encrypted files, allowing attackers to remove recovery slots without re-encrypting the payload. Attackers can modify the file header to delete recovery-slot fields and bypass authentication, silently removing recovery paths the owner deliberately added.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

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)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
9th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (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 27, 2026

Last Modified

October 1, 2026

Advisory Details (2)

Auto-updated Aug 27, 2026
Patch available. Sources: github.
Web page

openssl_encrypt before 1.4.9 Authentication Bypass via Recovery Slot Removal | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-authentication-bypass-via-recovery-slot-removal
GitHub advisoryMentions a patch (unverified)

Recovery-slot presence was not authenticated; recovery slots could be stripped from an envelope file undetected · Advisory · jahlives/openssl_encrypt · GitHub

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-grhj-cpmg-f5mx

Vendor Advisories for CVE-2026-81680(1)

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

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
openssl-encrypt0.2.2 ... 1.4.8 (53 versions)
  • every version up to 1.4.9: fixed in 1.4.9
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 75× 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 99 of 126 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 27 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% · 9th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  3. 2026-10-12 14:56 UTCEG score recompute
  4. 2026-10-11 19:20 UTCEG score recompute
  5. 2026-10-11 16:36 UTCEG score recompute
  6. 2026-10-11 13:54 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  9. 2026-10-10 09:47 UTCEG score recompute
  10. 2026-10-10 09:47 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  12. 2026-10-09 05:52 UTCEG score recompute
  13. 2026-10-09 05:52 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  15. 2026-10-08 04:14 UTCEG score recompute
  16. 2026-10-08 04:14 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  18. 2026-10-07 02:32 UTCEG score recompute
  19. 2026-10-07 02:32 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  21. 2026-10-06 00:54 UTCEG score recompute
  22. 2026-10-06 00:54 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  23. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  24. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  25. 2026-10-04 21:17 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
Show 74 more
  1. 2026-10-03 19:21 UTCEG score recompute
  2. 2026-10-03 19:21 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  3. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  4. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  5. 2026-10-02 17:07 UTCEG score recompute
  6. 2026-10-02 17:07 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  7. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  8. 2026-10-01 15:28 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  9. 2026-10-01 06:40 UTCEG score recompute
  10. 2026-10-01 06:40 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  11. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  12. 2026-09-30 05:02 UTCEG score recompute
  13. 2026-09-30 05:02 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  14. 2026-09-28 22:02 UTCEG score recompute
  15. 2026-09-28 22:02 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  16. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  17. 2026-09-27 20:23 UTCEG score recompute
  18. 2026-09-27 20:23 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  19. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  20. 2026-09-26 18:45 UTCEG score recompute
  21. 2026-09-26 18:45 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  22. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  23. 2026-09-25 02:15 UTCEG score recompute
  24. 2026-09-25 02:15 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  25. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  26. 2026-09-24 00:36 UTCEG score recompute
  27. 2026-09-24 00:36 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  28. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  29. 2026-09-22 22:58 UTCEG score recompute
  30. 2026-09-22 22:58 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  31. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  32. 2026-09-21 21:20 UTCEG score recompute
  33. 2026-09-21 21:20 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  34. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  35. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  36. 2026-09-20 19:42 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  37. 2026-09-19 18:04 UTCEG score recompute
  38. 2026-09-19 18:04 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  39. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  40. 2026-09-18 16:21 UTCEG score recompute
  41. 2026-09-18 16:21 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  42. 2026-09-17 14:33 UTCEG score recompute
  43. 2026-09-17 14:33 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  44. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  45. 2026-09-16 12:45 UTCEG score recompute
  46. 2026-09-16 12:45 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  47. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  48. 2026-09-15 11:07 UTCEG score recompute
  49. 2026-09-15 11:07 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  50. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  51. 2026-09-14 08:51 UTCEG score recompute
  52. 2026-09-14 08:51 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  53. 2026-09-13 07:13 UTCEG score recompute
  54. 2026-09-13 07:13 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  55. 2026-09-12 05:35 UTCEG score recompute
  56. 2026-09-12 05:35 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  57. 2026-09-11 03:57 UTCEG score recompute
  58. 2026-09-11 03:57 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  59. 2026-09-10 02:19 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  60. 2026-09-09 00:41 UTCEG score recompute
  61. 2026-09-09 00:41 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  62. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  63. 2026-09-07 21:45 UTCEG score recompute
  64. 2026-09-07 21:45 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  65. 2026-09-06 20:08 UTCEG score recompute
  66. 2026-09-06 20:08 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  67. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  68. 2026-09-05 18:28 UTCEG score recompute
  69. 2026-09-05 18:28 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  70. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  71. 2026-09-04 16:50 UTCEG score recompute
  72. 2026-09-04 16:50 UTCGHSA enrichmentGHSA-59ww-7vhf-hj2q · GitHub severity CRITICAL · GitHub CVSS 4.0
  73. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  74. 2026-09-03 15:11 UTCEG score recompute▲ 1.30

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-81680?
CVE-2026-81680 is a medium-severity vulnerability; its CVE record was published on August 27, 2026. openssl_encrypt versions before 1.4.9 fail to authenticate recovery-slot presence in envelope-format encrypted files, allowing attackers to remove recovery slots without re-encrypting the payload. Attackers can modify the file header to delete recovery-slot fields and bypass authentication,…
When was CVE-2026-81680 made public?
CVE-2026-81680 was made public on August 12, 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 27, 2026. EchelonGraph's copy of the record carries a last-modified date of October 1, 2026; the record at its source may have been updated since.
Is CVE-2026-81680 actively exploited?
CVE-2026-81680 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (9th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-81680?
CVE-2026-81680 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-81680?
A fix for CVE-2026-81680 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-81680 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-81680

Explore →

Is Your Infrastructure Affected by CVE-2026-81680?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs