WeGIA is a web manager for charitable institutions. Prior to 3.8.6, the auto-prepended web/html/seguranca/sessionStart.php reflects an attacker-supplied PHPSESSID cookie in a Set-Cookie response and uses DB_HOST as the cookie domain. If a victim authenticates while using the attacker-selected identifier, the attacker can reuse that identifier to hijack the authenticated session. The response also discloses the internal database host name through the cookie Domain attribute, and the vulnerable session handler affects all PHP pages. This issue is fixed in version 3.8.6.
CVE-2026-55682
HIGHPre-NVD 8.18.1ElevatedEG-KEV Tier 3: ElevatedEG-KEV is EchelonGraph's own tiering of exploitation signals from CISA KEV, CISA's SSVC data (Vulnrichment), ransomware data, public exploit-code references and EPSS.Tier 3 is not evidence of exploitation. It means public exploit code is referenced, or CISA's SSVC data says "public PoC", or EPSS ranks the CVE in the top 5%.Signals for this CVE: CISA's SSVC exploitation value: public PoC.EchelonGraph confidence 38%: a heuristic from the tier and the number of signals, not a measured probability.
EchelonGraph scoreMEDIUM confidence
“—” beside the score: it is equal to the CVSS score beside it.
This high-severity CVE scores 8.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (37th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Also known asEUVD-2026-101624 (ENISA EUVD)Source: ENISA EUVD
8.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (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: 0.4%CVSS: 8.1Exploit: No code on recordExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 8.1
- EG Score
- 8.1HIGHmedium confidence
- EG Risk
- 52EG Risk 52/100
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)Severity81% × 45%Impact severity (EG Severity): CVSS 8.1 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, Track* at medium and Attend at high mission impact.Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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 (8.1): severity, escalated by confirmed exploitation. This CVE's 8.1 is its impact severity (EG Severity), not escalated.
- EG Severity
- 8.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
- EG Likelihood
- 0.4% within 30 daysSource: FIRST EPSS. 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, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 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 low, Track* at medium and Attend at high mission impact.
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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 14, 2026
Last Modified
October 15, 2026
Advisory Details (5)
Auto-updated Oct 14, 2026🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
GitHub release Patch Available
3.8.6
Patch available: LabRedesCefetRJ/WeGIA 3.8.6
https://github.com/LabRedesCefetRJ/WeGIA/releases/tag/3.8.6GitHub commit Patch Available
commit f59cad3ac729 (LabRedesCefetRJ/WeGIA)
Patch available: LabRedesCefetRJ/WeGIA 3.8.6 (contains commit f59cad3ac729)
https://github.com/LabRedesCefetRJ/WeGIA/commit/f59cad3ac7292225e88699cac82775a9f534be05GitHub pull request Patch Available
Pre master jv 06 08 2026
Patch available: LabRedesCefetRJ/WeGIA 3.8.6 (PR #1705 merged 2026-06-10)
https://github.com/LabRedesCefetRJ/WeGIA/pull/1705Web page
Análise de vulnerabilidade do arquivo html/seguranca/sessionStart.php · Issue #221 · LabRedesCefetRJ/WeGIA · GitHub
https://github.com/LabRedesCefetRJ/WeGIA/issues/221GitHub advisoryMentions a patch (unverified)🟡 PoC Available
Session Fixation via User-Controlled PHPSESSID Cookie + DB_HOST Leak in html/seguranca/sessionStart.php · Advisory · LabRedesCefetRJ/WeGIA · GitHub
https://github.com/LabRedesCefetRJ/WeGIA/security/advisories/GHSA-5xhr-jrv8-j4j2Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 21× 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.
- 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
- 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
- 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
- 2026-10-25 14:18 UTCEG score recompute
- 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
- 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
- 2026-10-22 22:53 UTCEG score recompute
- 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 26th percentile
- 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
- 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
- 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
- 2026-10-18 03:30 UTCEG score recompute
- 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 26th percentile
- 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 26th percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
- 2026-10-15 14:27 UTCEG score recompute
- 2026-10-15 14:03 UTCEG score recompute
- 2026-10-14 20:34 UTCEG score recompute
- 2026-10-14 19:55 UTCEG score recomputeFirst assessed: 8.1 HIGH
- 2026-10-14 19:54 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-55682?
CVE-2026-55682 is a high-severity vulnerability; its CVE record was published on October 14, 2026. WeGIA is a web manager for charitable institutions. Prior to 3.8.6, the auto-prepended web/html/seguranca/sessionStart.php reflects an attacker-supplied PHPSESSID cookie in a Set-Cookie response and uses DB_HOST as the cookie domain. If a victim authenticates while using the attacker-selected…
When was the CVE record for CVE-2026-55682 published?
The CVE record for CVE-2026-55682 was published on October 14, 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 October 15, 2026; the record at its source may have been updated since.
Is CVE-2026-55682 actively exploited?
CVE-2026-55682 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-2026-55682?
CVE-2026-55682 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55682?
A fix for CVE-2026-55682 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-55682
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