CVE-2026-114731

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreHIGH confidence

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

Score 5.3 from GitHub Security Advisory (severity: MODERATE) published 2026-10-22. A secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-107998 (ENISA EUVD) · GHSA-mpw2-q5qr-3w4j (GitHub Security Advisories)Source: ENISA EUVD

5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an uncontrolled resource consumption vulnerability in the CSS proxy (the utils/modcss action). The fetched stylesheet was read into memory in full, with no size limit and no read timeout, so a stylesheet URL referencing an attacker-controlled host could be used to exhaust server memory. Upstream fixed this in the commit “Add a size limit to the CSS proxy content processing”, which caps the response at 5 MB, reads it as a stream and applies a read timeout.

CVSS v3
5.3
EG Score
5.3MEDIUMhigh confidence
EG Risk
39
EG Risk 39/100

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)
Severity53% × 45%
Impact severity (EG Severity): CVSS 5.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
37th
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 (5.3): severity, escalated by confirmed exploitation. This CVE's 5.3 is its impact severity (EG Severity), not escalated.

EG Severity
5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). 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; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days 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 low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

October 22, 2026

Last Modified

November 2, 2026

Advisory Details (6)

Auto-updated Nov 2, 2026
Patch available. Sources: github_commit, github_release.
GitHub commit

commit 99a5bdd05b01 (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 99a5bdd05b01 — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/99a5bdd05b01f45493cc0da4c96968eac7668126
GitHub release Patch Available

Roundcube Webmail 1.6.20

Patch available: roundcube/roundcubemail 1.6.20

https://github.com/roundcube/roundcubemail/releases/tag/1.6.20
GitHub release Patch Available

Roundcube Webmail 1.7.5

Patch available: roundcube/roundcubemail 1.7.5

https://github.com/roundcube/roundcubemail/releases/tag/1.7.5
Web page

Security updates 1.6.20 and 1.7.5 released

https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5
GitHub commit

commit 2c9f6da692fa (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 2c9f6da692fa — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/2c9f6da692fa37cad2aaf85d5b127b583d22b264
Web pageMentions a patch (unverified)

#1151279 - roundcube: Multiple security vulnerabilities - Debian Bug report logs

https://bugs.debian.org/1151279

Vendor Advisories for CVE-2026-114731(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 23× 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. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  2. 2026-11-02 16:30 UTCEG score recompute
  3. 2026-11-02 16:30 UTCGHSA enrichmentGHSA-mpw2-q5qr-3w4j · GitHub severity MODERATE · GitHub CVSS 5.3
  4. 2026-11-02 16:05 UTCEG score recompute
  5. 2026-11-02 16:05 UTCGHSA enrichmentGHSA-mpw2-q5qr-3w4j · GitHub severity MODERATE · GitHub CVSS 5.3
  6. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  7. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  8. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  9. 2026-10-30 02:55 UTCOSV refresh
  10. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  11. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  12. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  13. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  14. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  15. 2026-10-25 14:50 UTCEG score recompute
  16. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  18. 2026-10-22 17:10 UTCEG score recompute
  19. 2026-10-22 17:09 UTCGHSA enrichmentGHSA-mpw2-q5qr-3w4j · GitHub CVSS 5.3
  20. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-10-22 03:26 UTCEG score recompute
  22. 2026-10-22 02:36 UTCEG score recomputeFirst assessed: 5.3 MEDIUM
  23. 2026-10-22 02:35 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-114731?
CVE-2026-114731 is a medium-severity vulnerability; its CVE record was published on October 22, 2026. Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an uncontrolled resource consumption vulnerability in the CSS proxy (the utils/modcss action). The fetched stylesheet was read into memory in full, with no size limit and no read timeout, so a stylesheet URL referencing an…
When was the CVE record for CVE-2026-114731 published?
The CVE record for CVE-2026-114731 was published on October 22, 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 November 2, 2026; the record at its source may have been updated since.
Is CVE-2026-114731 actively exploited?
CVE-2026-114731 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-114731?
CVE-2026-114731 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-114731?
A fix for CVE-2026-114731 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-114731 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-114731

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