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 2026-10-24). 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 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: 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.

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

References (1)

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 ... 1:2.4.5+dfsg1-3 (43 versions)
  • every version on: no fix on record
—
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 8× in last 7d / 44× 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.

  1. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  2. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  3. 2026-10-25 14:21 UTCEG score recompute
  4. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  5. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  6. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  7. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  8. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  9. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  10. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-10-18 03:32 UTCEG score recompute
  12. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  13. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  14. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  15. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  16. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  18. 2026-10-12 15:58 UTCEG score recompute
  19. 2026-10-11 19:41 UTCEG score recompute
  20. 2026-10-11 16:56 UTCEG score recompute
  21. 2026-10-11 14:20 UTCEG score recompute
  22. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  23. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  24. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  25. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 20th percentile
Show 66 more
  1. 2026-10-08 00:54 UTCEG score recompute
  2. 2026-10-08 00:54 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  3. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  4. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  5. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  6. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  7. 2026-10-04 20:34 UTCEG score recompute
  8. 2026-10-04 20:34 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  9. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  10. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-10-02 00:37 UTCEG score recompute
  12. 2026-10-02 00:37 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  13. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  15. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  16. 2026-09-29 04:15 UTCEG score recompute
  17. 2026-09-29 04:15 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  18. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  19. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  20. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  21. 2026-09-26 08:44 UTCEG score recompute
  22. 2026-09-26 08:44 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  23. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  24. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  25. 2026-09-23 11:54 UTCEG score recompute
  26. 2026-09-23 11:54 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  27. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  28. 2026-09-20 16:23 UTCEG score recompute
  29. 2026-09-20 16:23 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  30. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  31. 2026-09-17 20:51 UTCEG score recompute
  32. 2026-09-17 20:51 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  33. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  34. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  35. 2026-09-15 00:20 UTCEG score recompute
  36. 2026-09-15 00:20 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  37. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  38. 2026-09-12 04:50 UTCEG score recompute
  39. 2026-09-12 04:50 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  40. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  41. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  42. 2026-09-09 09:20 UTCEG score recompute
  43. 2026-09-09 09:20 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  44. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  45. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  46. 2026-09-06 13:50 UTCEG score recompute
  47. 2026-09-06 13:50 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  48. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  49. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  50. 2026-09-03 18:20 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  51. 2026-09-03 12:19 UTCEG score recompute
  52. 2026-09-03 12:19 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  53. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  54. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  55. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  56. 2026-08-31 16:47 UTCEG score recompute
  57. 2026-08-31 16:47 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  58. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  59. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  60. 2026-08-28 20:30 UTCEG score recompute
  61. 2026-08-28 20:30 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  62. 2026-08-28 19:45 UTCEG score recompute
  63. 2026-08-28 19:45 UTCGHSA enrichmentGHSA-x4gp-83hc-j86g · GitHub severity LOW · GitHub CVSS 3.1
  64. 2026-08-28 12:23 UTCEG score recompute
  65. 2026-08-28 11:24 UTCEG score recomputeFirst assessed: 3.1 LOW
  66. 2026-08-28 11:19 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-52681

Explore →

Is Your Infrastructure Affected by CVE-2026-52681?

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

Book a Demo →Browse All CVEs