CVE-2026-54521

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Source

https://cve.org/CVERecord?id=CVE-2026-54521

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54521.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-54521

Aliases

GHSA-r8ff-qr7g-pvw6

Published

2026-09-17T20:17:47Z

Modified

2026-09-20T14:24:14Z

Severity

6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator

Summary

FairEmail: Cross-site scripting (XSS) in AMP message rendering (ActivityAMP)

Details

FairEmail is a fully featured, open source, privacy-friendly email app for Android. Prior to 1.2319, the ActivityAMP AMP message renderer in app/src/main/java/eu/faircode/email/ActivityAMP.java enables JavaScript in its WebView but incompletely sanitizes untrusted message HTML. For non-allowlisted hosts, script.removeAttr("src") leaves inline script elements in the document and does not reject event-handler attributes or javascript: URLs on other elements. A crafted AMP email can execute arbitrary JavaScript when a recipient opens the message and enables the AMP toggle. The script can read the message DOM, exfiltrate message data, and display phishing overlays within the message-body area. Exploitation requires the recipient to enable the AMP toggle, and practical exposure is reduced because AMP email is uncommon. This issue is fixed in version 1.2319.

Database specific

{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-79"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54521.json"
}

References

Affected packages

Git / github.com/m66b/fairemail

Affected ranges

Type

GIT

Repo

https://github.com/m66b/fairemail

Events

Introduced

Fixed

fb37bbfabf5e75d08f0cfa6ce9b84469d62a20a0

Fixed

0b0fe9ac1cee98620f16aef85cebf67869ca41a8

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "1.2319"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

0.*

0.1

0.10

0.11

0.12

0.13

0.14

0.15

0.16

0.17

0.18

0.19

0.2

0.20

0.21

0.22

0.23

0.24

0.25

0.26

0.27

0.28

0.29

0.3

0.30

0.31

0.32

0.33

0.34

0.35

0.36

0.37

0.38

0.39

0.4

0.40

0.41

0.42

0.43

0.44

0.45

0.46

0.47

0.48

0.49

0.5

0.50

0.51

0.52

0.53

0.54

0.55

0.56

0.57

0.58

0.59

0.6

0.60

0.61

0.62

0.63

0.64

0.65

0.66

0.67

0.68

0.69

0.7

0.70

0.71

0.72

0.73

0.8

0.9

1.*

1.077

1.100

1.1000

1.1001

1.1002

1.1003

1.1004

1.1005

1.1006

1.1007

1.1008

1.1009

1.101

1.1010

1.1011

1.1012

1.1013

1.1014

1.1015

1.1016

1.1017

1.1018

1.1019

1.102

1.1020

1.1021

1.1022

1.1023

1.1024

1.1025

1.1026

1.1027

1.1028

1.1029

1.103

1.1030

1.1031

1.1032

1.1033

1.1034

1.1035

1.1036

1.1037

1.1038

1.1039

1.104

1.1040

1.1041

1.1042

1.1043

1.1044

1.1045

1.1046

1.1047

1.1048

1.1049

1.105

1.1050

1.1051

1.1052

1.1053

1.1054

1.1055

1.1056

1.1057

1.1058

1.1059

1.106

1.1060

1.1061

1.1062

1.1063

1.1064

1.1065

1.1066

1.1067

1.1068

1.1069

1.107

1.1070

1.1071

1.1072

1.1073

1.1074

1.1075

1.1076

1.1078

1.1079

1.108

1.1080

1.1081

1.1082

1.1083

1.1084

1.1085

1.1086

1.1087

1.1088

1.1089

1.109

1.1090

1.1091

1.1092

1.1093

1.1094

1.1095

1.1096

1.1097

1.1098

1.1099

1.110

1.1100

1.1101

1.1102

1.1103

1.1104

1.1105

1.1106

1.1107

1.1108

1.111

1.1110

1.1111

1.1112

1.1113

1.1114

1.1115

1.1116

1.1117

1.1118

1.1119

1.112

1.1120

1.1121

1.1122

1.1123

1.1124

1.1125

1.1126

1.1127

1.1128

1.1129

1.113

1.1130

1.1131

1.1132

1.1133

1.1134

1.1135

1.1136

1.1137

1.1138

1.1139

1.114

1.1140

1.1141

1.1142

1.1143

1.1145

1.1146

1.1147

1.1149

1.115

1.1150

1.1151

1.1153

1.1154

1.1155

1.1156

1.1157

1.1158

1.1159

1.116

1.1160

1.1161

1.1162

1.1163

1.1164

1.1165

1.1166

1.1167

1.1168

1.1169

1.117

1.1170

1.1171

1.1172

1.1173

1.1174

1.1175

1.1176

1.1177

1.1178

1.1179

1.118

1.1180

1.1181

1.1182

1.1183

1.1184

1.1185

1.1186

1.1187

1.1188

1.1189

1.119

1.1190

1.1191

1.1192

1.1193

1.1194

1.1195

1.120

1.1207

1.1208

1.1209

1.121

1.1210

1.1211

1.1212

1.1213

1.1214

1.1215

1.1216

1.1217

1.1218

1.1219

1.122

1.1220

1.1221

1.1222

1.1223

1.1224

1.1225

1.1226

1.1227

1.1228

1.1229

1.123

1.1230

1.1231

1.1232

1.1234

1.1235

1.1236

1.1237

1.1238

1.1239

1.124

1.1241

1.1244

1.1245

1.1246

1.1247

1.1248

1.1249

1.125

1.1250

1.1251

1.1252

1.1254

1.1255

1.1256

1.1257

1.1258

1.1259

1.126

1.1260

1.1261

1.1262

1.1263

1.1264

1.1265

1.1266

1.1267

1.1268

1.1269

1.127

1.1270

1.1271

1.1272

1.1273

1.1274

1.1275

1.1276

1.1277

1.1278

1.1279

1.128

1.1280

1.1281

1.1282

1.1283

1.1284

1.1285

1.1286

1.1287

1.1288

1.1289

1.129

1.1290

1.1291

1.1292

1.1293

1.1294

1.1295

1.1296

1.1297

1.1298

1.1299

1.130

1.1300

1.1301

1.1302

1.1303

1.1305

1.1306

1.1307

1.1308

1.1309

1.131

1.1310

1.1311

1.1312

1.1313

1.1314

1.1315

1.1316

1.1317

1.1318

1.1319

1.132

1.1320

1.1321

1.1322

1.1323

1.1324

1.1325

1.1326

1.1327

1.1328

1.1329

1.133

1.1330

1.1331

1.1332

1.1333

1.1334

1.1335

1.1336

1.1337

1.1338

1.1339

1.134

1.1340

1.1341

1.1342

1.1343

1.1344

1.1345

1.1346

1.1347

1.1348

1.1349

1.135

1.1350

1.1351

1.1352

1.1353

1.1354

1.1355

1.1356

1.1357

1.1358

1.1359

1.136

1.1360

1.1361

1.1362

1.1363

1.1364

1.1365

1.1366

1.1367

1.1368

1.1369

1.137

1.1370

1.1371

1.1372

1.1373

1.1374

1.1375

1.1376

1.1377

1.1378

1.1379

1.138

1.1380

1.1381

1.1382

1.1383

1.1384

1.1385

1.1386

1.1387

1.1388

1.1389

1.139

1.1390

1.1391

1.1392

1.1393

1.1394

1.1395

1.1396

1.1397

1.1398

1.1399

1.140

1.1400

1.1401

1.1402

1.1403

1.1404

1.1405

1.1406

1.1407

1.1408

1.1409

1.141

1.1410

1.1411

1.1412

1.1414

1.1415

1.1416

1.1417

1.1418

1.1419

1.142

1.1420

1.1421

1.1422

1.1423

1.1424

1.1425

1.1426

1.1427

1.1428

1.1429

1.143

1.1430

1.1431

1.1432

1.1433

1.1434

1.1435

1.1436

1.1437

1.1438

1.1439

1.144

1.1440

1.1441

1.1442

1.1443

1.1444

1.1445

1.1446

1.1447

1.1448

1.1449

1.145

1.1450

1.1451

1.1452

1.1453

1.1455

1.1456

1.1457

1.1458

1.1459

1.146

1.1460

1.1461

1.1462

1.1463

1.1464

1.1465

1.1466

1.1467

1.1468

1.147

1.1470

1.1471

1.1472

1.1473

1.1474

1.1475

1.1476

1.1477

1.1478

1.1479

1.148

1.1480

1.1481

1.1482

1.1483

1.1484

1.1485

1.1486

1.1487

1.1488

1.1489

1.149

1.1490

1.1491

1.1492

1.1493

1.1494

1.1495

1.1496

1.1497

1.1498

1.1499

1.150

1.1500

1.1501

1.1502

1.1503

1.1504

1.1505

1.1506

1.1507

1.1508

1.1509

1.151

1.1510

1.1511

1.1512

1.1513

1.1514

1.1515

1.1516

1.1517

1.1518

1.1519

1.1520

1.1521

1.1522

1.1523

1.1524

1.1525

1.1526

1.1527

1.1528

1.1529

1.153

1.1530

1.1531

1.1532

1.1533

1.1534

1.1535

1.1536

1.1537

1.1538

1.1539

1.154

1.1541

1.1542

1.1543

1.1544

1.1545

1.1546

1.1547

1.1548

1.1549

1.155

1.1550

1.1551

1.1552

1.1553

1.1554

1.1555

1.1556

1.1557

1.1558

1.1559

1.156

1.1560

1.1561

1.1562

1.1563

1.1564

1.1565

1.1566

1.1567

1.1568

1.1569

1.157

1.1570

1.1571

1.1572

1.1573

1.1574

1.1575

1.1576

1.1577

1.1578

1.1579

1.158

1.1580

1.1581

1.1582

1.1583

1.1584

1.1585

1.1586

1.1587

1.1588

1.1589

1.159

1.1590

1.1591

1.1592

1.1593

1.1594

1.1595

1.1596

1.1597

1.1598

1.1599

1.160

1.1600

1.1601

1.1602

1.1603

1.1604

1.1605

1.1606

1.1607

1.1608

1.1609

1.161

1.1610

1.1611

1.1612

1.1613

1.1614

1.1615

1.1616

1.1617

1.1618

1.1619

1.162

1.1620

1.1622

1.1623

1.1624

1.1625

1.1626

1.1627

1.1628

1.1629

1.163

1.1630

1.1631

1.1632

1.1633

1.1634

1.1635

1.1636

1.1637

1.1638

1.1639

1.164

1.1640

1.1641

1.1642

1.1643

1.1644

1.1645

1.1646

1.1647

1.1648

1.1649

1.165

1.1650

1.1651

1.1652

1.1653

1.1654

1.1655

1.1656

1.1657

1.1658

1.1659

1.166

1.1660

1.1661

1.1662

1.1663

1.1664

1.1665

1.1667

1.1668

1.1669

1.167

1.1670

1.1671

1.1672

1.1673

1.1674

1.1675

1.1676

1.1677

1.1678

1.1679

1.168

1.1680

1.1681

1.1682

1.1683

1.1684

1.1685

1.1686

1.1687

1.1688

1.1689

1.169

1.1690

1.1691

1.1693

1.1694

1.1695

1.1696

1.1697

1.1698

1.1699

1.170

1.1700

1.1701

1.1702

1.1703

1.1704

1.1705

1.1706

1.1707

1.1708

1.1709

1.171

1.1710

1.1711

1.1712

1.1713

1.1714

1.1715

1.1716

1.1717

1.1718

1.1719

1.172

1.1720

1.1721

1.1722

1.1723

1.1724

1.1725

1.1726

1.1727

1.1728

1.1729

1.173

1.1730

1.1731

1.1732

1.1733

1.1734

1.1735

1.1736

1.1737

1.1738

1.1739

1.174

1.1740

1.1741

1.1742

1.1743

1.1744

1.1745

1.1746

1.1747

1.1748

1.1749

1.175

1.1750

1.1751

1.1752

1.1753

1.1754

1.1755

1.1756

1.1757

1.176

1.1760

1.1761

1.1762

1.1763

1.1764

1.1765

1.1766

1.1767

1.1768

1.1769

1.177

1.1770

1.1771

1.1772

1.1773

1.1774

1.1775

1.1776

1.1777

1.1778

1.1779

1.178

1.1780

1.1781

1.1782

1.1783

1.1784

1.1785

1.1786

1.1787

1.1788

1.1789

1.179

1.1790

1.1791

1.1792

1.1793

1.1794

1.1796

1.1797

1.1799

1.180

1.1800

1.1801

1.1802

1.1803

1.1804

1.1805

1.1806

1.1807

1.1808

1.1809

1.1810

1.1811b

1.1811c

1.1813

1.1814

1.1815

1.1816

1.1817

1.1818

1.1819

1.182

1.1820

1.1821

1.1822

1.1823

1.1824

1.1825

1.1826

1.1827

1.1828

1.1829

1.183

1.1832

1.1833

1.1834

1.1835

1.1836

1.1837

1.1838

1.1839

1.184

1.1840

1.1841

1.1842

1.1843

1.1844

1.1845

1.1846

1.1847

1.1848

1.1849

1.185

1.1850

1.1851

1.1852

1.1853

1.1854

1.1855

1.1856

1.1857

1.1858

1.1859

1.186

1.1860

1.1861

1.1862

1.1863

1.1864

1.1865

1.1866

1.1867

1.1868

1.1869

1.187

1.1870

1.1871

1.1872

1.1873

1.1874

1.1875

1.1875xda

1.1876

1.1877

1.1878

1.1879

1.188

1.1881

1.1882

1.1883

1.1884

1.1885

1.1885b

1.1886

1.1887

1.1888

1.1889

1.189

1.1890

1.1891

1.1892

1.1893

1.1894

1.1895

1.1896

1.1897

1.1898

1.1899

1.190

1.1900

1.1901

1.1902

1.1903

1.1904

1.1905

1.1906

1.1907

1.1908

1.1909

1.191

1.1910

1.1911

1.1912

1.1913

1.1915

1.1916

1.1917

1.1918

1.1919

1.192

1.1920

1.1921

1.1922

1.1923

1.1924

1.1925

1.1927

1.1928

1.1929

1.193

1.1930

1.1931

1.1932

1.1933

1.1934

1.1935

1.1936

1.1937

1.1938

1.1939

1.194

1.1940

1.1941

1.1942

1.1944

1.1945

1.1946

1.1947

1.1948

1.1949

1.195

1.1950

1.1951

1.1952

1.1954

1.1955

1.1956

1.1957

1.1958

1.1959

1.196

1.1960

1.1961

1.1962

1.1963

1.1964

1.1965

1.1966

1.1967

1.1968

1.1969

1.197

1.1970

1.1971

1.1972

1.1973

1.1974

1.1975

1.1976

1.1977

1.1978

1.1979

1.198

1.1980

1.1981

1.1982

1.1983

1.1984

1.1985

1.1986

1.1987

1.1988

1.1989

1.199

1.1990

1.1991

1.1992

1.1993

1.1994

1.1995

1.1996

1.1997

1.1998

1.1999

1.1999b

1.1999c

1.200

1.2000

1.2001

1.2002

1.2003

1.2003b

1.2003c

1.2003d

1.2004

1.2006

1.2007

1.2007b

1.2007c

1.2008

1.2008b

1.2009

1.201

1.2010

1.2010b

1.2011

1.2012

1.2013

1.2014

1.2015

1.2016

1.2017

1.2018

1.2019

1.2020

1.2021

1.2022

1.2023

1.2024

1.2025

1.2026

1.2027

1.2028

1.2029

1.203

1.2030

1.2031

1.2032

1.2033

1.2034

1.2035

1.2036

1.2037

1.2038

1.2039

1.204

1.2040

1.2041

1.2042

1.2043

1.2045

1.2046

1.2047

1.2048

1.2049

1.205

1.2050

1.2051

1.2052

1.2053

1.2054

1.2055

1.2056

1.2057

1.2058

1.206

1.2060

1.2061

1.2062

1.2063

1.2064

1.2065

1.2066

1.2067

1.2068

1.2069

1.207

1.2070

1.2071

1.2072

1.2073

1.2074

1.2075

1.2076

1.2077

1.2078

1.2079

1.208

1.2080

1.2081

1.2082

1.2083

1.2085

1.2086

1.2087

1.2088

1.2089

1.209

1.2090

1.2091

1.2092

1.2093

1.2095

1.2096

1.2097

1.2098

1.2099

1.210

1.2100

1.2101

1.2102

1.2103

1.2104

1.2105

1.2106

1.2107

1.2108

1.2109

1.211

1.2110

1.2111

1.2112

1.212

1.2129

1.213

1.2130

1.2131

1.2132

1.2133

1.2134

1.2135

1.2136

1.2137

1.2138

1.2139

1.214

1.2140

1.2141

1.2142

1.2143

1.2144

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Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54521.json"

vanir_signatures

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vanir_signatures_modified

"2026-09-20T14:24:14Z"