CVE-2026-52681

LOWPre-NVD 3.13.1
EchelonGraph scoreMEDIUM confidence

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

Score 3.1 from GitHub Security Advisory (severity: LOW) published 2026-08-28. A secondary CVSS source baseline 3.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-67678 (ENISA EUVD) · GHSA-x4gp-83hc-j86g (GitHub Security Advisories)Source: ENISA EUVD

3.1EG
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: 0.3%CVSS: 3.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Sieve CPU resource usage is tracked in the compiled script, so an attacker that has valid credentials can reset the accounting by repeatedly changing the active script. Compiled script files are also not removed when a script is deleted or renamed. The configured Sieve CPU limit can be bypassed, allowing sustained CPU consumption, and the leftover files increase disk consumption. Both can cause degradation of service for mail delivery. Monitor system for abnormal CPU usage and disk consumption. Update to non-vulnerable version. No publicly available exploits are known.

CVSS v3
3.1
EG Score
3.1LOWmedium confidence
EG Risk
14
EG Risk 14/100

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)
Severity31% × 45%
Impact severity (EG Severity): CVSS 3.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 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
0.3%
EPSS %ILE
22nd
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 (3.1): severity, escalated by confirmed exploitation. This CVE's 3.1 is its impact severity (EG Severity), not escalated.

EG Severity
3.1 LOWCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.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 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.

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 28, 2026

Last Modified

September 3, 2026

Vendor Advisories for CVE-2026-52681(1)

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

Affected Packages

(5 across 5 ecosystems)
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
dovecot—
  • every version up to 2.4.5-r0: fixed in 2.4.5-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
dovecot—
  • every version up to 2.4.5-r0: fixed in 2.4.5-r0
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
dovecot1:2.3.19.1+dfsg1-2.1 ... 1:2.3.19.1+dfsg1-2.1+deb12u6 (7 versions)
  • every version up to 1:2.3.19.1+dfsg1-2.1+deb12u7: fixed in 1:2.3.19.1+dfsg1-2.1+deb12u7
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
dovecot1:2.4.1+dfsg1-6 ... 1:2.4.1+dfsg1-6+deb13u6 (7 versions)
  • every version up to 1:2.4.1+dfsg1-6+deb13u7: fixed in 1:2.4.1+dfsg1-6+deb13u7
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
dovecot1:2.4.1+dfsg1-6 ... 1:2.4.4+dfsg1-2 (12 versions)
  • every version up to 1:2.4.5+dfsg1-1: fixed in 1:2.4.5+dfsg1-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 31× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 110 rows 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 10 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  2. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  3. 2026-11-10 16:44 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  4. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  5. 2026-11-08 16:39 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  6. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  7. 2026-11-06 16:38 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  8. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  9. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  10. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  11. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  12. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  13. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  14. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  15. 2026-10-29 17:40 UTCEchelonGraph re-scored
  16. 2026-10-29 17:40 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  17. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  18. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  19. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  20. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  21. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  22. 2026-10-25 14:21 UTCEchelonGraph re-scored
  23. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  24. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  25. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
Show 75 more
  1. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  2. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  4. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  5. 2026-10-18 03:32 UTCEchelonGraph re-scored
  6. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  7. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  8. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  9. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  10. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  12. 2026-10-12 15:58 UTCEchelonGraph re-scored
  13. 2026-10-11 19:41 UTCEchelonGraph re-scored
  14. 2026-10-11 16:56 UTCEchelonGraph re-scored
  15. 2026-10-11 14:20 UTCEchelonGraph re-scored
  16. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  18. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  19. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  20. 2026-10-08 00:54 UTCEchelonGraph re-scored
  21. 2026-10-08 00:54 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  22. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  23. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  24. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  25. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  26. 2026-10-04 20:34 UTCEchelonGraph re-scored
  27. 2026-10-04 20:34 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  28. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  29. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  30. 2026-10-02 00:37 UTCEchelonGraph re-scored
  31. 2026-10-02 00:37 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  32. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  33. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  34. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  35. 2026-09-29 04:15 UTCEchelonGraph re-scored
  36. 2026-09-29 04:15 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  37. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  38. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  39. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  40. 2026-09-26 08:44 UTCEchelonGraph re-scored
  41. 2026-09-26 08:44 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  42. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  43. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  44. 2026-09-23 11:54 UTCEchelonGraph re-scored
  45. 2026-09-23 11:54 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  46. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  47. 2026-09-20 16:23 UTCEchelonGraph re-scored
  48. 2026-09-20 16:23 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  49. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  50. 2026-09-17 20:51 UTCEchelonGraph re-scored
  51. 2026-09-17 20:51 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  52. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  53. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  54. 2026-09-15 00:20 UTCEchelonGraph re-scored
  55. 2026-09-15 00:20 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  56. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  57. 2026-09-12 04:50 UTCEchelonGraph re-scored
  58. 2026-09-12 04:50 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  59. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  60. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  61. 2026-09-09 09:20 UTCEchelonGraph re-scored
  62. 2026-09-09 09:20 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  63. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  64. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  65. 2026-09-06 13:50 UTCEchelonGraph re-scored
  66. 2026-09-06 13:50 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  67. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  68. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  69. 2026-09-03 18:20 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  70. 2026-09-03 12:19 UTCEchelonGraph re-scored
  71. 2026-09-03 12:19 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  72. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  73. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  74. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  75. 2026-08-31 16:47 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2026-52681?
CVE-2026-52681 is a low-severity vulnerability; its CVE record was published on August 28, 2026. Sieve CPU resource usage is tracked in the compiled script, so an attacker that has valid credentials can reset the accounting by repeatedly changing the active script. Compiled script files are also not removed when a script is deleted or renamed. The configured Sieve CPU limit can be bypassed,…
When was the CVE record for CVE-2026-52681 published?
The CVE record for CVE-2026-52681 was published on August 28, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 3, 2026; the record at its source may have been updated since.
Is CVE-2026-52681 actively exploited?
CVE-2026-52681 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (22nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-52681?
CVE-2026-52681 has a CVSS base score of 3.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-52681?
A fix for CVE-2026-52681 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-52681 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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